Callaghan

If you're looking for an Irish last name-turned-first name that's as cool as they come, consider Callaghan. Typically masculine, Callaghan stems from Ó Ceallacháin, a Gaelic title meaning "descendant of Ceallachán." Ceallachán comes from Ceallach, another Gaelic moniker that holds definitions like "bright-headed," "strife," and "church." Whether it reminds you of your Irish heritage or celebrates the cleverest kiddo you know, Callaghan is a charming choice.