Meaning This Celtic/Irish name means "fighter" and "world ruler." Origin of Donnell Celtic , Irish Popular Middle Names Charles, Edward, Eugene, Jerome, Saleem, Samuel Pronunciation 🔊 Listen Donnell DAH-nell Similar Names Donal Doire Gofraidh Dinsmore Donaghy Duffey Caoimhghin Niece Donell Carthach Year by Year Popularity of Donnell