400+ Irish Last Names (With Meanings and Popularity)

Macauly is a masculine name primarily recognized as a spelling variant of Macaulay, which originated as a Scottish and Irish surname before transitioning to occasional first-name usage. Derived from the Gaelic "Mac Amhalghaidh," meaning "son of Amhalghadh," it carries connections to Celtic heritage. The name gained some recognition through notable bearers like English historian Thomas Babington Macaulay and actor Macaulay Culkin (though he uses the more traditional spelling). The variant spelling with an 'e' dropped remains less common. Macauly has a distinguished, scholarly quality while maintaining approachable pronunciation. While never reaching mainstream popularity, the name appeals to parents seeking names with Celtic roots and historical depth without being overly common. Usage remains relatively uncommon across English-speaking countries.

Undiscovered Irish surname with a lot more bounce and masculine dash than Shannon.

A common surname in Ireland, often use as an anglicization of Mac Giolla Phádraig. This name could honor a Patrick. It's also a way to get to Fitz as a nickname.

McDuff is a masculine surname-turned-first-name with Scottish Gaelic origins. Derived from "mac Dhuibh" meaning "son of Duff" or "son of the dark one," it carries strong historical significance in Scottish heritage. The name gained literary fame through Shakespeare's "Macbeth," where Macduff is a heroic character who ultimately defeats the titular king. As a first name, McDuff is quite rare, appealing to parents with Scottish ancestry or those seeking an uncommon name with built-in nickname possibilities (Duff). It projects strength, individualism, and a connection to Celtic tradition, though its distinctive prefix makes it immediately recognizable as having clan heritage.

Donovan is on the rise, so why not this sequel?

If you're looking for a pleasing namesake that's more modern than Darrell/Darryl, this would make an excellent choice. Farrell is an Anglicized form of the Irish Fergal, and was well used as a first name into the nineteenth century, before it faded to mostly surname use.

Like the other O' names, this is a wonderful way to pass down a family name.

Keeffe is a masculine name with Irish Gaelic origins, derived from the surname O'Keeffe or Ó Caoimh, meaning 'descendant of Caoimh' (where Caoimh means 'gentle' or 'kind'). This surname-turned-first-name reflects the ongoing trend of adapting family names for personal use. Keeffe may also evoke associations with the famous American artist Georgia O'Keeffe, lending it cultural significance. As a first name, Keeffe remains relatively uncommon, giving it a distinctive quality that appeals to parents seeking something unique yet rooted in tradition. The name's strong consonants and short, punchy sound give it a masculine edge while maintaining its Celtic heritage.

Kavanagh, which can also be spelled Cavanagh, Cavenagh, Kavanaugh, and Cavanaugh, is one of the few traditional Irish surnames not to start with Mc or O'. Kavanagh relates to the name first Kevin or Caomhan. Early kings of Leinster bore the name Kavanagh.

To modernize and add some oomph to the dated CASEY, add an O'-and also honor the great Irish playwright Sean.

If you're looking for an Irish last name that moves beyond Casey and Cassidy, this one is pleasant sounding and worth considering. Kavanaugh, which can also be spelled Cavanagh, Cavenagh, Kavanagh, and Cavanaugh, is one of the few traditional Irish surnames not to start with Mc or O'. Kavanagh relates to the name first Kevin or Caomhan. Early kings of Leinster bore the name Kavanaugh.

While the lin ending is more commonly found in girls' names, Carlin is an authentic Irish male choice and was used just about evenly for both sexes in the US last year.

Connolly, an alternate spelling of Connelly, could make a livelier and less common substitute for Connor.

Cochran is primarily known as a surname of Scottish and Irish origin, derived from the Gaelic MacEachrain or O'Corcrain, meaning "son of Eachran" or "descendant of Corcran." As a masculine first name, Cochran represents the trend of using family surnames as given names, which became popular in American naming practices. The name carries associations of strength and heritage, with a distinctly Celtic foundation. While uncommon as a first name, Cochran has an established presence through notable bearers of the surname, including aviation pioneer Jacqueline Cochran and musician Eddie Cochran. The name has a strong, distinguished quality with two syllables that create a balanced rhythm, appealing to parents seeking an uncommon name with historical roots and a masculine, preppy character.

Mcconnal is a masculine surname-turned-first name with Scottish and Irish Gaelic origins. Derived from 'Mac Dhomhnaill,' meaning 'son of Donald,' it belongs to the category of patronymic names that indicated ancestry. The name carries strong connections to clan heritage in Scotland, particularly the powerful MacDonald clan of the Highlands and Islands. As a first name, Mcconnal remains quite rare, appealing to parents seeking uncommon options with historical depth. The name conveys a sense of strength, tradition, and Celtic heritage. Its distinctive spelling with the 'Mc' prefix clearly signals its Gaelic roots, while the unusual ending differentiates it from the more common 'McConnell' variant. The name projects masculine qualities while honoring family lineage.

Breslin is a classic Irish surname that's found its way onto the first name roles in the US, but only for girls.

Forget Donald. Honor Grandpa Don with this new spin.

An attractive Irish surname that is currently used exclusively for girls in the US, likely due to the feminine associations with the first name Kerry and with skating champion Nancy Kerrigan.

Faggan is a rare masculine name with likely Irish and Gaelic origins. It may have evolved as a variant of the surname Fagan, which derives from the Gaelic 'Ó Faodhagáin,' meaning 'descendant of Faodhagán' (a personal name possibly meaning 'little fire'). As a given name, Faggan remains exceptionally uncommon, appearing infrequently in historical records. The name carries a strong, distinctive sound with ancient Celtic connections. While some surname-based first names have gained popularity, Faggan has remained obscure, perhaps due to potential pronunciation challenges or its unfamiliarity in modern naming trends. For families with Irish heritage, it might serve as a unique connection to ancestral roots.