Meaning A girl's name of Irish origin, it means "dark seal." Origin of Fionnghuala Celtic , Irish +-100%Zoom level changed to 1 Popular Middle Names Pronunciation 🔊 Listen Fionnghuala Similar Names Keir Keyara Kieryn Kiorah Thames Ciara Brieonna Searra Shaelee Blakely Year by Year Popularity of Fionnghuala