Gronw Pebr (Welsh pronunciation: [ˈɡrɔnu ˈpɛbr̩]) "Gronw the Radiant" is a warrior, hunter and antagonist in Welsh tradition, appearing primarily in the fourth branch of the Mabinogi as the lord of Penllyn, the lover of Blodeuwedd and the murderer of Lleu Llaw Gyffes. He is also mentioned in the Welsh Triads and in the medieval poem Cad Goddeu.