Ireland’s last names hold centuries of history, often telling the stories of clans, warriors, poets, and landowners. Some, like Tighe and Trainor, have clear Gaelic origins, while others, like Tobin, came with the Normans and became deeply embedded in Irish identity. Whether tied to noble ancestry, fierce battles, or the land itself, these names carry a legacy that still resonates today.

We provide rich resources on Irish names, with categorized lists of first and last names – take a look at our curated section on Irish first names that start with T!

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Authentic Irish Last Names that Start with T

⭐ Our Favourite: Turlough (Mac Turlough)

Pronunciation: TUR-lok
First recorded: 10th century
Meaning: Derived from Turlough, meaning “abettor” or “supporter,” this name has long been associated with leadership in Connacht. Turlough O’Connor was one of Ireland’s High Kings in the 12th century. The name signifies strength and political influence, often linked to chieftains and rulers. It is still widely recognized in the west of Ireland, carrying a regal and historical legacy.
Why it’s our favourite: Turlough is a name of power, once belonging to kings and leaders who shaped Ireland’s history. It’s a reminder of a time when Gaelic Ireland was ruled by fierce but diplomatic High Kings. Its strong connection to Irish sovereignty and its continued use in Ireland today make it a standout choice.

🍀 Tierney (Ó Tighearnaigh)

Pronunciation: TEER-nee
First recorded: 11th century
Region: Galway, Donegal
Meaning: Derived from tighearna, meaning “lord” or “master,” the Tierney family were once rulers and chieftains in Connacht. The name reflects nobility and leadership, with records of the Ó Tighearnaigh clan holding power in County Galway. Notable bearers include Irish historian Michael Tierney and American actor Gene Tierney. The name remains strong in Ireland, symbolizing heritage and leadership.

⚔️ Tracy (Ó Treasaigh)

Pronunciation: TRAY-see
First recorded: 12th century
Region: Limerick, Tipperary
Meaning: Originating from treasach, meaning “war-like” or “fighter,” this name was common among warrior clans in Munster. The Ó Treasaigh sept was known for its strength in battle, and many became noted figures in military history. A famous bearer is William Tracy, a notable figure in the Norman invasion of Ireland. Today, the name remains common in Ireland and Irish communities abroad.

🍷 Tobin (Tóibín)

Pronunciation: TOH-bin
First recorded: 13th century
Region: Kilkenny, Tipperary
Meaning: A Norman last name derived from St. Aubyn, it was introduced to Ireland after the Norman invasion. The Tobins settled in Kilkenny, where they became powerful landowners. Known for their involvement in Irish politics and resistance to English rule, the Tobin family name is deeply tied to medieval Irish history. It remains a distinctive Irish last name, often associated with noble lineage.

🌊 Tormey (Ó Tormaigh)

Pronunciation: TOR-mee
First recorded: 10th century
Region: Westmeath
Meaning: Possibly derived from tormach, meaning “thunder” or “surging sea,” the Tormey family were ancient Gaelic chieftains in the midlands. The name was prominent in Westmeath, where the Ó Tormaigh clan held lands for centuries. It has a strong historical presence, with notable figures in law and politics bearing the name. Tormey remains a respected last name in Ireland today.

🏹 Tully (Ó Taithligh)

Pronunciation: TULL-ee
First recorded: 9th century
Region: Cavan, Monaghan
Meaning: The name Tully comes from taithleach, meaning “peaceful” or “gentle.” The Ó Taithligh family were respected scholars and landowners in Ulster. Many members of the clan became poets, priests, and historians. The name has remained prominent throughout Irish history, with several notable figures in literature and education. Tully continues to be a well-known last name in Ireland and beyond.

🏰 Toner (Ó Tomhrair)

Pronunciation: TOH-ner
First recorded: 11th century
Region: Derry, Tyrone
Meaning: Thought to be derived from Norse influence, Tomhrair is linked to Viking settlers who integrated into Gaelic society. The Ó Tomhrair family became prominent in Ulster, particularly in the counties of Derry and Tyrone, where they played significant roles in trade and military affairs. The name remains widespread in Northern Ireland, symbolizing strength and resilience.

🌿 Teehan (Ó Tíocháin)

Pronunciation: TEE-han
First recorded: 14th century
Region: Laois, Kilkenny
Meaning: Derived from tíochán, meaning “quiet” or “peaceful,” the name was associated with monks and scholars. The Ó Tíocháin family was historically linked to religious and academic institutions in Leinster, with members known for their contributions to Irish education. Today, Teehan remains a rare but distinctly Irish last name.

⚡ Treacy (Ó Treasaigh)

Pronunciation: TRAY-see
First recorded: 12th century
Region: Tipperary, Offaly
Meaning: A variation of Tracy, this last name also comes from treasach, meaning “warrior” or “fierce one.” The Ó Treasaigh clan was known for its military prowess in medieval Ireland. Treacy families were historically found in Munster and Leinster, with several figures playing roles in Irish uprisings and resistance movements. It remains a strong, proud name with deep roots in Ireland.

🏔️ Toal (Ó Tuathail)

Pronunciation: TOLE
First recorded: 10th century
Region: Fermanagh, Tyrone
Meaning: A variation of the name O’Toole, derived from tuathal, meaning “ruler of the people,” the Ó Tuathail family was historically significant in Leinster and Ulster. The Toal last name is particularly common in Northern Ireland, where descendants of the clan remain. The name has been associated with leadership and governance in Irish history.

🛡️ Toland (Ó Tuathaláin)

Pronunciation: TOE-land
First recorded: 11th century
Region: Donegal
Meaning: Derived from tuathalán, meaning “mighty people” or “champion,” the Toland name has roots in Gaelic nobility. The Ó Tuathaláin family was an influential clan in Ulster, particularly in Donegal, where they played key roles in defending Gaelic lands. Notable bearers include John Toland, an Irish philosopher and early advocate for religious tolerance. The name symbolizes strength and wisdom in Irish heritage.

🌄 Tuohy (Ó Tuathaigh)

Pronunciation: TOO-ee
First recorded: 11th century
Region: Clare, Galway
Meaning: Derived from tuath, meaning “people” or “tribe,” the Tuohy last name indicates a strong connection to leadership within early Gaelic clans. The Ó Tuathaigh family were influential in Connacht, often serving as local rulers and warriors. The name is still well-known in the west of Ireland, with members historically active in politics and law. It symbolizes unity and strength within a community.

🛡️ Tuhill (Ó Tuathail)

Pronunciation: TOO-hill
First recorded: 10th century
Region: Wicklow, Kildare
Meaning: A variant of O’Toole, meaning “ruler of the people,” the Ó Tuathail family were one of Leinster’s most powerful Gaelic dynasties. They were heavily involved in resisting Norman incursions, with historical records placing them as rulers of the Wicklow Mountains. Tuhill remains a lesser-known variation, but it carries the same connotations of leadership and resilience in Irish history.

🌾 Tallon (Ó Tallamháin)

Pronunciation: TAL-un
First recorded: 12th century
Region: Meath, Dublin
Meaning: Thought to derive from talamh, meaning “earth” or “land,” the Tallon family were historically landowners and farmers in the east of Ireland. The name suggests a deep connection to agriculture and settlement. Over time, many Tallons became involved in trade and politics. The last name remains common in parts of Leinster and has historical links to rural prosperity.

🏝️ Trehill (Ó Traighill)

Pronunciation: TREH-hill
First recorded: 13th century
Region: Kerry, Clare
Meaning: Closely related to Trehy, this name comes from traigh, meaning “strand” or “shoreline.” The Ó Traighill family were historically involved in fishing and trade along Ireland’s western coast. Some records suggest they were also navigators and shipbuilders. Today, the name is rare but still carries a deep connection to Ireland’s maritime past.

⚒️ Teggart (Ó Teagairt)

Pronunciation: TEG-ert
First recorded: 12th century
Region: Armagh, Down
Meaning: Possibly linked to teagartha, meaning “defender” or “protector,” the Teggart family were historically associated with Ulster. Many members served as warriors and guardians for ruling Gaelic families. The name was often connected to resistance against English rule, and several Teggarts were known for their roles in Irish rebellions. It remains a name associated with strength and perseverance.

🏇 Troy (Ó Troighthigh)

Pronunciation: TROY
First recorded: 13th century
Region: Offaly, Limerick
Meaning: Derived from troigh, meaning “foot” or “runner,” the Ó Troighthigh family were known for their speed and agility, often serving as messengers and warriors. Some theories suggest Norman influence, linking the name to the famous city of Troy. The last name remains common in Ireland and Irish-American communities, with historical connections to Irish sports and military service.

🚶‍♂️ Troughton (Ó Troightín)

Pronunciation: TRAW-ton
First recorded: 14th century
Region: Kilkenny, Wexford
Meaning: Likely derived from troightín, meaning “little foot,” this last name may have originally been a nickname for a swift or nimble person. It later became associated with tradesmen and travelers. The name gained prominence in England and Ireland, with figures like astronomer Richard Troughton making notable contributions to science. It represents movement, adaptability, and craftsmanship.

🏆 Torney (Ó Torna)

Pronunciation: TOR-nee
First recorded: 10th century
Region: Antrim, Derry
Meaning: Connected to Torna, an ancient Gaelic personal name meaning “champion” or “leader,” the Ó Torna family were influential poets and historians in medieval Ireland. Torna Éices, a famous bard, was a key figure in Irish literary tradition. The last name remains relatively rare but carries a strong connection to Ireland’s poetic and intellectual history.

🏰 Taaffe (Ó Taidhg)

Pronunciation: TAF
First recorded: 13th century
Region: Louth, Meath
Meaning: The Taaffe family, originally of Norman descent, settled in Ireland in the 12th century and became influential landowners. The Gaelic form, Ó Taidhg, comes from Tadhg, meaning “poet” or “philosopher.” The Taaffes held titles such as the Viscounts of Corren and played key roles in Irish and European military history. Notably, Theobald Taaffe was an Irish general in the 17th century. The name remains prominent in Leinster and has a strong aristocratic association.

🌊 Tahon (Ó Tatháin)

Pronunciation: TAH-hun
First recorded: 11th century
Region: Clare, Limerick
Meaning: Thought to originate from tathán, meaning “little lord” or “noble one,” the Ó Tatháin family were historically linked to monastic settlements in Munster. Their name appears in early church records, suggesting a connection to religious leadership. Over time, the last name became less common but still exists in pockets of western Ireland. It reflects a legacy of spirituality and leadership.

⚔️ Treenan (Ó Tréanáin)

Pronunciation: TREE-nan
First recorded: 12th century
Region: Roscommon, Galway
Meaning: Derived from tréan, meaning “strong” or “mighty,” this last name was associated with warrior clans of Connacht. The Ó Tréanáin family were known for their resilience and military service, often fighting for local Gaelic rulers. The name symbolizes bravery and endurance, with historical connections to battles against Norman and later English rule. Today, it is rare but remains an important name in Irish history.

Last Names with a Strong Irish Influence

🏰 Tynan (Ó Teimhneáin)

Pronunciation: TIE-nan
First recorded: 11th century
Region: Laois, Offaly
Meaning: Derived from teimhean, meaning “dark” or “obscure,” the Ó Teimhneáin family were originally from the midlands of Ireland. The name is associated with both warriors and scholars, with early references to members of the clan serving as poets and historians. Over time, Tynan became linked to Irish religious history, with several abbots and priests bearing the name. It remains common in Ireland and Irish diaspora communities.

⚔️ Toland (Mac Tuathaláin)

Pronunciation: TOE-land
First recorded: 12th century
Region: Donegal
Meaning: Meaning “descendant of Tuathalán,” which comes from tuathal, meaning “mighty people” or “ruler,” the Toland name has both Gaelic and Norse influences. The Mac Tuathaláin family were significant figures in Ulster, often involved in local leadership and resistance against invaders. Notably, John Toland, an Irish philosopher of the 17th century, was an influential thinker on religious tolerance and free thought. The name remains strong in Northern Ireland.

🌊 Tormey (Mac Tormaigh)

Pronunciation: TOR-mee
First recorded: 10th century
Region: Westmeath
Meaning: Derived from tormach, meaning “thunder” or “stormy,” the Mac Tormaigh family were originally chieftains in the midlands of Ireland. The name is often linked to resilience and strength, with historical figures known for their military prowess. Tormey families played a role in local governance, with some becoming influential in Irish politics. Today, the name carries a sense of heritage and endurance.

🌾 Tallon (Ó Tallamháin)

Pronunciation: TAL-un
First recorded: 12th century
Region: Meath, Dublin
Meaning: Likely derived from talamh, meaning “earth” or “land,” the Tallon name is associated with farming and settlement. The Ó Tallamháin family were landowners and agricultural leaders in medieval Leinster, with historical records showing them involved in trade and governance. Over time, the name spread into England and France, but it remains deeply connected to Irish rural heritage.

🏆 Torrens (Mac Toráin)

Pronunciation: TOR-ens
First recorded: 10th century
Region: Antrim, Derry
Meaning: Derived from torán, meaning “little chief,” the Mac Toráin family were minor chieftains in Ulster. The last name has strong links to Scottish and Irish heritage, with many members migrating between the two regions over centuries. The Torrens name later became prominent in legal and land ownership systems, particularly with Robert Torrens, the creator of the land title registration system in Australia. It remains a symbol of leadership and governance.

🌿 Teevan (Ó Taobháin)

Pronunciation: TEE-van
First recorded: 13th century
Region: Cavan, Leitrim
Meaning: From taobh, meaning “side” or “hill slope,” the Ó Taobháin family were originally from Ulster and were known for their connection to rural landscapes. Historically, they were landowners and cattle herders. Some members of the family played roles in Irish rebellion movements, particularly during the 17th and 18th centuries. The name remains relatively rare but is deeply tied to Ireland’s pastoral history.

🏹 Trant (Mac Traoint)

Pronunciation: TRANT
First recorded: 14th century
Region: Kerry, Cork
Meaning: Believed to be of Norman origin, the Trant family settled in Ireland during the medieval period and eventually became Gaelicized. The name may derive from traoin, meaning “strong” or “enduring.” The Mac Traoint family were influential in Munster, particularly in trade and commerce. Many later emigrated to America, where the name became prominent among Irish-American families.

🌊 Trehy (Ó Traithigh)

Pronunciation: TRAY-hee
First recorded: 11th century
Region: Waterford, Cork
Meaning: Derived from traith, meaning “shore” or “beach,” the Trehy family were historically associated with coastal areas. Many members were fishermen or involved in maritime trade. The name is particularly found in Munster, where the Ó Traithigh clan was known for their connection to seafaring. It represents a strong link to Ireland’s coastal heritage.

🍀 Talty (Ó Tailtigh)

Pronunciation: TALL-tee
First recorded: 12th century
Region: Clare, Limerick
Meaning: Possibly derived from Tailtiu, an ancient Irish goddess associated with fertility and the harvest, the Ó Tailtigh family were once prominent in Munster. The last name is linked to farming and rural life, with historical records showing the family as landowners and cattle breeders. The name remains unique and is closely tied to traditional Irish mythology and agriculture.

🏰 Tigue (Ó Taidhg)

Pronunciation: TEEG
First recorded: 11th century
Region: Galway, Mayo
Meaning: A variation of Ó Taidhg, derived from Tadhg, meaning “poet” or “philosopher,” the Tigue name was historically associated with learning and leadership. The Ó Taidhg family were noble warriors and scholars in Connacht, with some branches becoming poets and advisors to Irish chieftains. Over time, the last name became anglicized into various spellings, but it retains its deep Gaelic roots.

🍷 Tobin (Mac Tóibín)

Pronunciation: TOH-bin
First recorded: 13th century
Region: Kilkenny, Tipperary
Meaning: Originally a Norman name derived from St. Aubyn, the Tobins became Gaelicized after settling in Ireland following the Norman invasion. The family established itself in Kilkenny and Tipperary, gaining prominence as landowners and military leaders. The Tobins were known for their defiance against English rule, often siding with Irish rebels. Their name is now well-known in both Ireland and Irish-American communities.

🛡️ Toman (Ó Tomáin)

Pronunciation: TOH-man
First recorded: 12th century
Region: Roscommon, Westmeath
Meaning: Likely derived from tom, meaning “mound” or “hill,” the Ó Tomáin family were landowners and warriors in central Ireland. The name appears in early Gaelic manuscripts, often linked to families providing military support to regional kings. Over time, the last name evolved into Toman and Tomaney, maintaining its presence in Irish history.

⛪ Taggart (Mac an tSagairt)

Pronunciation: TAG-ert
First recorded: 10th century
Region: Tyrone, Donegal
Meaning: Meaning “son of the priest,” Mac an tSagairt was historically used for families descended from priests, particularly before clerical celibacy became strictly enforced. The name was prominent in Ulster, where the Taggart family were influential in religious and scholarly circles. The name remains common in Ireland and Scotland, reflecting its Gaelic origins and strong Catholic heritage.

🌄 Toland (Ó Tuathaláin)

Pronunciation: TOE-land
First recorded: 12th century
Region: Donegal, Derry
Meaning: From tuathalán, meaning “mighty people” or “ruler,” the Tolands were a powerful family in Ulster. The name is closely tied to Gaelic leadership and Viking influences, as many Norse-Gaelic families integrated into Irish society. John Toland, a famous Irish philosopher, was known for his progressive ideas on religion and politics. The last name remains prominent in Northern Ireland and Scotland.

🏹 Trainor (Ó Tréanóir)

Pronunciation: TRAY-nor
First recorded: 13th century
Region: Armagh, Louth
Meaning: Derived from tréan, meaning “strong” or “mighty,” the Ó Tréanóir family were warriors and protectors in medieval Ireland. The name was historically associated with fighting on behalf of local kings and defending Irish territories. Trainors were also known for their craftsmanship, particularly in metalwork and weaponry. The name still carries connotations of strength and endurance.

⚡ Traynor (Mac Thréinfhir)

Pronunciation: TRAY-nor
First recorded: 11th century
Region: Monaghan, Cavan
Meaning: Coming from tréinfhear, meaning “strong man,” this last name signifies physical and strategic strength. The Mac Thréinfhir clan were warriors in Ulster, often serving as bodyguards to Irish chieftains. Many later became influential figures in Irish resistance movements. Today, Traynor is common in Ireland, Scotland, and among the Irish diaspora in America.

🌿 Tomney (Ó Tomhnaigh)

Pronunciation: TOM-nee
First recorded: 14th century
Region: Meath, Westmeath
Meaning: Likely derived from tomhnaigh, meaning “field” or “meadow,” the Tomney family were historically farmers and landowners in Leinster. The name was linked to agriculture and rural settlements, with members often involved in local governance. Though less common today, it still holds a strong presence in central Ireland.

🏆 Tomlin (Mac Tomáis)

Pronunciation: TOM-lin
First recorded: 13th century
Region: Wexford, Kilkenny
Meaning: Derived from Mac Tomáis, meaning “son of Thomas,” this name was introduced by Norman settlers and became Gaelicized over time. The Tomlins were active in trade and politics, playing a key role in Irish history. The name spread widely across the British Isles and America, but it retains a strong connection to its Irish roots.

🏰 Toran (Ó Toráin)

Pronunciation: TOR-an
First recorded: 10th century
Region: Donegal, Tyrone
Meaning: Derived from torán, meaning “little chief” or “leader,” the Ó Toráin family were historically a respected Gaelic clan in Ulster. They played roles in regional battles and were known for their influence in local governance. The name is sometimes linked to early medieval nobility, and its descendants can be found in both Ireland and Scotland. It carries connotations of leadership and resilience.

🌿 Tiney (Ó Tanaí)

Pronunciation: TIN-ee
First recorded: 14th century
Region: Kilkenny, Wexford
Meaning: Possibly derived from tanai, meaning “slender” or “delicate,” the name may have originated as a nickname. The Ó Tanaí family were known as skilled artisans and craftsmen in Leinster. Over time, the name became anglicized to various spellings. While rare today, it is still found in Irish-American communities. It symbolizes craftsmanship and precision.

⚔️ Tunney (Ó Tonnaigh)

Pronunciation: TUN-ee
First recorded: 12th century
Region: Mayo, Sligo
Meaning: Likely derived from tonnach, meaning “wavy” or “billowing,” the name may have originally referred to those who lived near water or had a connection to the sea. The Ó Tonnaigh family were known as traders and fishermen along the west coast of Ireland. Notably, Gene Tunney, an Irish-American boxer, became world-famous for defeating Jack Dempsey in 1926. The name remains well-known in Ireland and beyond.

🌊 Torpey (Ó Torpaigh)

Pronunciation: TOR-pee
First recorded: 13th century
Region: Clare, Limerick
Meaning: The name Ó Torpaigh is believed to come from torpach, meaning “stout” or “strong.” The family was historically involved in farming and landholding in Munster. They were known for their resilience in times of conflict, often resisting English land confiscations. Torpey remains a distinctive last name in Clare and among Irish emigrants in America and Australia.

🛡️ Tohill (Mac Tuathail)

Pronunciation: TOE-hill
First recorded: 11th century
Region: Derry, Antrim
Meaning: A variation of Ó Tuathail, meaning “ruler of the people,” the Mac Tuathail family were once a dominant Gaelic clan in Leinster before spreading to Ulster. They were warriors and statesmen, often involved in negotiations and leadership. Over time, Tohill became a last name associated with both Irish and Scottish heritage. It symbolizes governance and strength.

Traditional Irish names are filled with history, culture, and mythology, so take a look at our extensive collections of first and last names to find one that captures the essence of Ireland.