Meaning A boy's name of Welsh origin, it means "Variant of Cadwaladr: War leader; battle leader." Origin of Cadwaladyr Welsh Popular Middle Names Pronunciation 🔊 Listen Cadwaladyr Similar Names Cadwalader Cedrych Cadel Caddell Caddock Cadwaladr Cadwallader Cadell Cailean Marcelino Year by Year Popularity of Cadwaladyr