Meaning A girl's name of Irish origin, it means "Pure." Origin of Kaitlin Irish Popular Middle Names AnnMarie, Elise, Valerie Pronunciation 🔊 Listen Kaitlin KAYT-len Similar Names Kathleena Kaethe Katelin Kateline Kimbro Adn Taithleach Cathasach Izett Aatika Year by Year Popularity of Kaitlin