400+ Irish Last Names (With Meanings and Popularity)

Energetic Connelly variation that works better for girls than for boys.

Barely-used Irish surname that's more streamlined than popular Donovan.

This name is a fabulous option for parents looking for a victorious name but who find Victor just a little too obvious. This name can also be spelled Kearney.

Fitz is the same as Mac or O' or even son -- it designates a name that originated as a patronymic.

One of the jauntiest o' the O' names, the birth name of actor/ rapper Ice Cube.

Keller is a German surname that originated as an occupational name for a cellar or store master. It may be an honorific for deaf-blind author and activist Helen Keller.

Ealair is the Gaelic form of Hilary, making McKellar an inventive way to honor a Hilary, Hillary, or Ellery in your life.

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

With the jaunty rhythm of other Irish surnames like Finnegan and Sullivan, plus the possibility for cool nickname Gil, this seems like a good candidate for the first name slot. It was the name of the main character in the TV show Gilligan's Island.