Meaning Keegan's language of origin is Celtic, and means descendant of Aodhagan. Origin of Keegan Celtic , Irish Popular Middle Names James, Lee, Michael, Charles, Alexander, Allen, Gregory, Robert, Thomas, Joseph Pronunciation 🔊 Listen Keegan KIY-gahn Similar Names Keagan Neil Kayse Braydon Ryan Braedin Quinn Reagen Reyan Brady Year by Year Popularity of Keegan