Meaning A boy's name of Welsh origin, it means "Variant of Llewellyn: Leader Lionlike Origin of Llewelyn Welsh +-100%Zoom level changed to 1 Popular Middle Names Pronunciation 🔊 Listen Llewelyn Similar Names Lyn Lewellyn Lewin Llewellyn Cadwalader Cadwaladyr Fluellen Lewis Leandre Leandrew Year by Year Popularity of Llewelyn