Meaning A boy's name of Welsh origin, it means "Legendary son of Kynyr Origin of Kei Welsh Popular Middle Names Albert, Franz, Gavin Pronunciation 🔊 Listen Kei Similar Names Kei/Kou Powell Kelyn Kynon Kyledyr KyndMryn Kynedyr Kynlas Kynwal Kywrkh Year by Year Popularity of Kei