International Baby Names · Middle Names, Surnames, and Nicknames · Unisex Baby Names
400+ Irish Last Names (With Meanings and Popularity)
Across 21 pages
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O'fallon
Irish
"son of the leader"
Fallon has gone feminine, but this puts it back in the boys' camp.
O'grady
Irish
"son of the noble one"
Like the other O' names, this is a wonderful way to pass down a family name.
O'hara
Irish
"son of Eaghra"
The O'Haras are descended from Eaghra -- pronounced and phonetically spelled Ara -- the lord of Luighne, the modern Leyney in County Sligo. As a name, this makes a satisfying new twist on Harry, and…
O'keefe
Irish
"son of the kind one"
Most parents interested in this name would be honoring either an ancestor or painter Georgia O'Keeffe.
O'keeffe
Irish surname
If you love the venerable Southwestern painter but feel Georgia's gotten too overheated, you might want to go all the way to this Irish surname in the fashionable O' family.
O'neal
Irish
"from the chief's line"
Perfect as an updated namesake for Great-Uncle Neal (or Neil).
O'neall
O'neall is a masculine name derived from Irish surname traditions. It represents a variant spelling of O'Neill, one of Ireland's oldest and most prominent family names. The original Gaelic form, Ó…
O'neel
O'neel is a distinctive masculine name that appears to be a creative spelling variation of O'Neill, the Irish surname meaning 'champion' or 'descendant of Niall.' The apostrophe indicates its surname…
O'neil
O'Neil is a masculine name with Irish origins, derived from the Gaelic surname Ó Néill, meaning "descendant of Niall." The name carries prestigious historical significance as it references one of…
O'neill
O'Neill is primarily known as an Irish surname meaning 'descendant of Niall,' derived from a legendary High King of Ireland named Niall of the Nine Hostages. As a first name, it represents a modern…
O'reilly
Irish
"son of the courageous one"
Reilly and Riley are hugely popular, but O'Reilly is still an up-and-comer.
O'riley
O'Riley is a masculine surname-turned-first name of Irish origin. It's derived from the Gaelic surname Ó Raghailligh, meaning "descendant of Raghallach," a personal name thought to mean "valiant" or…
O'ryan
O'ryan is a contemporary masculine name that represents a creative respelling of Orion, the mighty hunter from Greek mythology who was transformed into a constellation. The apostrophe adds a…
O'shane
O'shane is a masculine name that appears to combine the Irish patronymic prefix 'O'' with 'Shane,' a name of Irish origin meaning 'God is gracious' or 'gift from God.' The apostrophe structure is…
O'shay
O'shay is a contemporary masculine name that appears to be a modified spelling of the Irish surname O'Shea, which means "descendant of Séaghdha" (hawk-like or admirable). The apostrophe reflects its…
O'shea
Irish
"hawklike, stately"
One of the jauntiest o' the O' names, the birth name of actor/ rapper Ice Cube.
O'sullivan
Irish
"son of the black-eyed one"
Sullivan has made itself into a first name and O'Sullivan may well follow suit.
Patten
Patten originated as an English surname derived from the Middle English word "paten," referring to a type of wooden shoe or clog. As a first name, Patten exemplifies the continuing trend of…
Phelan
Irish
"wolf"
Phelan, pronounced FAY-lan or FEE-lan, is an appealing Irish surname name, with a rich history in Irish myth and religious and secular life. One bearer was a fiercely loyal follower of the legendary…
Quigley
Irish
"from the mother's side"
The spoiled only son of the richest family in town in a fifties movie.