Meaning A boy's name of Celtic origin, it means "Mythical Hound of Ulster." Origin of Cuchulain Celtic , Irish +-100%Zoom level changed to 1 Popular Middle Names Pronunciation 🔊 Listen Cuchulain Similar Names Cooley Coolie Cullo Conall Cernach Nisien Covey Cooey Cumhea Connla Custennin Year by Year Popularity of Cuchulain