400+ Irish Last Names (With Meanings and Popularity)

  1. Connery
    • Origin:

      Irish
    • Meaning:

      "warrior-lord"
    • Description:

      Irish surname-names are hugely popular for girls in the US these days, with Riley and Kennedy ranking high on the official popularity lists. Connery is uncommon, but certainly attractive and usable.
  2. O'sullivan
    • Origin:

      Irish
    • Meaning:

      "son of the black-eyed one"
    • Description:

      Sullivan has made itself into a first name and O'Sullivan may well follow suit.
  3. Runyon
    • Origin:

      Irish
    • Meaning:

      "son of a champion"
    • Description:

      Runyon is an Irish surname with considerable flair; some will connect it with Guys and Dolls writer Damon Runyon.
  4. O'shane
    • O'ryan
      • Keating
        • Origin:

          English or Irish surname
        • Meaning:

          "kite"
        • Description:

          Keating is familiar as a surname but unexpected as a first. It boasts the always energetic -ing ending.
      • Fee
        • Origin:

          Diminutive of Fiona
        • Description:

          Too fiscal.
      • Mcewen
        • Keigan
          • Clooney
            • Origin:

              Irish
            • Meaning:

              "from the meadow"
            • Description:

              Variation of Cluny best only if you're a major George fan. And even then, better go with George, Georgia, or Georgiana.
          • Boyne
            • Origin:

              Irish
            • Meaning:

              "white cow"
            • Description:

              The famous Battle of the Boyne, in Ireland, vanquished the Catholic king.
          • O'neill
            • Costello
              • Origin:

                Irish surname
              • Meaning:

                "from England"
              • Description:

                The fashion for using surnames as firsts has extended beyond the familiar Morgan and Parker to choices such as Cohen and O'Brien to -- why not? -- this quintessentially Irish name with the friendly o ending.
            • Keenen
              • Origin:

                Variation of Keenan
              • Meaning:

                "ancient"
              • Description:

                Energetic name that's keen to please.
            • Kegan
              • Fegan
                • Looney
                  • Origin:

                    Irish and Manx
                  • Meaning:

                    "the son of Giolla Dhomhnaigh"
                  • Description:

                    The Gaelic name Giolla Dhomhnagh ("servant of Donagh") turned into the patronymic Mac Giolla Dhomhnagh, which was whispered down the alley until it became MacGillowney, and eventually Looney. Although it's similar in sound to popular Luna, this isn't an Irish surname that's likely to get much use.
                • Devaughn
                  • O'riley
                    • O'shea
                      • Origin:

                        Irish
                      • Meaning:

                        "hawklike, stately"
                      • Description:

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