Irish last names that start with Y are rare. In fact, there are only a small number of surnames under Y that show up in Irish surname lists and records, and most are either anglicized forms, later adoptions, or surnames that became established in Ireland over time.
If you searched for Irish Last Names that Start with Y, the short answer is that Young is the clearest example you will see in Irish surname indexes, with Irish-language forms including Ó Hógáin and de Siún in some records. Beyond that, the Y section is slim, so it helps to know which names are genuinely used in Ireland and which are simply surnames found there.
That makes this letter a bit unusual. Most Irish surname guides have plenty to work with under M, O, or C. Y, on the other hand, is the awkward corner of the alphabet, not very Irish at first glance, but still worth knowing if you are tracing family lines, building a family tree, or just curious about rare surnames.
Compared with letters like O, M, and C, Y has very few true Irish surnames. That is partly because the traditional Irish naming system developed around prefixes such as Ó, Mac, and Ní, and around Gaelic personal names that usually anglicized into other initial letters. If you want a sense of just how different the balance is, compare it with Irish last names that start with O or Irish last names that start with M, where the lists are much longer.
So when you see a Y surname connected to Ireland, it usually falls into one of three groups:
That distinction matters if you are doing genealogy. A family listed as Young in one record might connect to a different Irish-language surname in another. Spellings can also shift depending on region, church records, migration, and whether the family used English or Irish forms.
If you are browsing broadly, you may also want to read our guides to Irish Last Names, Common Irish Surnames, and the full Irish Last Names A to Z hub.
Because the letter is so limited, this list includes surnames found in Ireland or tied to Irish surname usage, along with Irish-language equivalents where they are documented. There are not 25 historically solid native-Gaelic Y surnames to list, so accuracy wins here over padding.
Meaning: Usually understood as “the younger,” often used to distinguish a son or younger man from an older relative of the same name.
Origin: Young is widely used in the English-speaking world, but it also appears in Irish surname records and indexes. In Irish-language surname material, it can be linked with forms such as Ó Hógáin and de Siún. In Ireland, it is most often associated with Ulster family lines, which is why it turns up so regularly in Northern genealogy.
Pronunciation: YUNG
Context: This is the main surname you are likely to encounter when looking for Irish last names that start with Y, especially in family records from Ulster and in diaspora research.
Meaning: The exact root points to a personal name or byname rather than a simple modern English gloss, so it should not be forced into a neat one-word translation.
Origin: An Irish-language surname form associated in surname indexes with Young.
Pronunciation: oh HOH-gawn or oh HOH-gin, depending on local pronunciation and anglicization
Context: If your family line appears as Young in English records, this is one of the Irish forms worth watching for in folklore collections and Irish-language material.
Meaning: A surname form rather than a straightforward vocabulary word, so it is better treated as a family-name variant than given a casual translation.
Origin: Another Irish-language form associated in surname indexing with Young.
Pronunciation: deh SHOON or deh SHOON-y in approximate English phonetics
Context: This is the kind of variant that matters in archival work. A family may appear under one form in oral tradition and another in civil or church records.
Meaning: Same general meaning as Young, usually “the younger.”
Origin: A spelling variant of Young found in English-language records.
Pronunciation: YUNG
Context: Older records, handwritten parish entries, and migration documents often produce spelling variants like this, especially before surname spelling settled down.
Meaning: Literally “son of Young” in structure.
Origin: Not a classic native Irish surname, but a surname form that can appear in Irish-connected family lines through settlement and migration within the British Isles.
Pronunciation: YUNG-sun
Context: This is more relevant in family-history research than in traditional Irish surname studies, but it can still show up in Irish records.
Meaning: The meaning is not securely handled by a simple popular gloss, so it is best not to invent one.
Origin: A surname strongly associated with Ireland through the Yeats family, even though it is not one of the old Gaelic Ó or Mac forms.
Pronunciation: YAYTS
Context: Many people know the name through the poet W. B. Yeats, born in Dublin in 1865, which gives it an unmistakably Irish association in literature and family-history interest.
Meaning: Usually derived from an older word connected with a gate, though surname meanings can vary by family line.
Origin: Primarily English in origin, but found in Ireland and sometimes folded into Irish surname searches because of long use there.
Pronunciation: YAYTS
Context: If you are researching an Irish-American line, this is the kind of surname that can be Irish by residence and family history rather than by Gaelic root.
Meaning: A locational surname connected with York.
Origin: English locational surname found in Ireland in some records.
Pronunciation: YORK
Context: This is not a traditional Gaelic Irish surname, but it can appear in Irish family trees, especially where families moved through Britain and Ireland before emigrating.
Meaning: Same basic locational origin as York.
Origin: A variant spelling of York.
Pronunciation: YORK
Context: Variant spellings like this are common in older records, so it is worth checking if a surname seems to disappear between one generation and the next.
Meaning: A place-based surname from England.
Origin: Not Gaelic in origin, but found among surnames used in Ireland.
Pronunciation: YARD-lee
Context: This is more a surname-in-Ireland than a native Irish surname, which is an important distinction if you are trying to identify ethnic or linguistic roots.
Meaning: Historically linked with a social rank or landholding class.
Origin: English occupational or status surname that can appear in Irish records.
Pronunciation: YOH-mun
Context: Names like this remind you that Irish surname research often overlaps with plantation history, migration, and administrative record-keeping.
Meaning: Not safely reduced to a single certain modern gloss without family-specific evidence.
Origin: A surname found in the British Isles and occasionally in Irish records.
Pronunciation: YELL
Context: This is a fringe entry for Irish surname research, but worth noting because rare letters often produce small, scattered record sets.
Meaning: Traditionally connected with a river name or local landscape in England.
Origin: English in origin, with occasional Irish usage through settlement and movement of families.
Pronunciation: YOH
Context: A surname can be part of Irish family history without being ethnically Gaelic, which is exactly the sort of nuance that makes Y surnames tricky.
Meaning: The meaning is not one to guess at casually.
Origin: A British surname that can appear in Irish-linked records, especially in emigrant family trees.
Pronunciation: YAR-null
Context: This is another example where presence in Irish records does not automatically equal ancient Gaelic origin.
Young is the standout here. If you only remember one entry from this list, make it that one. It is the surname most clearly tied to Ireland under Y in surname indexes, and it is also the most useful starting point for genealogy.
The interesting bit is that Young does not always stay Young. In Irish surname material, it can connect with Ó Hógáin and de Siún. That means a family line may move between English and Irish forms depending on the source. Parish books, folklore collections, civil registrations, immigration paperwork, and census records do not always agree with each other. Family historians learn this early, usually after a strong cup of tea and a mild loss of patience.
Yeats is notable in a different way. It is not one of the classic Gaelic clan surnames, but it is undeniably associated with Ireland because of the Yeats family and Irish literary history. That makes it culturally Irish in a way many people immediately recognize.
The rest of the Y surnames are mostly surnames used in Ireland rather than surnames native to the Irish language. If your goal is a deep ethnic-origin study, keep that distinction in mind. If your goal is simply to identify a surname in an Irish family tree, they still belong in the conversation. You see the same difference with a few other uncommon initials too, including Irish last names that start with W, where long use in Ireland does not always mean Gaelic origin.
For anyone building out a broader surname list, our guides to Irish Last Names, Common Irish Surnames, and the A to Z surname hub will give you a much fuller picture than the lonely Y section can manage on its own.
If your surname begins with Y, start by assuming there may be multiple spellings and possibly an Irish-language equivalent. That saves time.
If you are doing Irish-American genealogy, it also helps to remember that families often simplified names after immigration. Some Y surnames may be the result of a spelling choice made in the United States, not the original form used in Ireland. If you are comparing branches of the same family, it can help to look at nearby naming patterns too, including Irish last names that start with C and other far more common initials.
No. Y is one of the rarest starting letters for Irish surnames. There are only a few surnames clearly associated with Ireland under this letter, and even fewer that are native Gaelic forms.
Young is the clearest and most useful example. It appears in Irish surname material and has documented Irish-language associations such as Ó Hógáin and de Siún.
It can be. Young is not exclusively Irish in origin, but it is used in Ireland and appears in Irish surname indexes. In genealogy, it is best treated as a surname with genuine Irish relevance.
Traditional Irish surnames usually developed from Gaelic personal names and naming patterns that anglicized under other letters, especially O, Mc, Mac, and C. Y simply was not a major starting letter in the older Gaelic surname system.
If this list felt short, that is because the letter really is short on options. For a much broader look at naming traditions, meanings, and common family names, these guides are the best next step:
Irish last names that start with Y are unusual, sparse, and a little messy in the records. That is exactly what makes them interesting. If your family name sits in this section of the alphabet, you are working with a smaller pool, but also one where variant spellings and Irish-language forms can tell a surprisingly good story.
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