Uther Pendragon (/ˈʲuːθərpɛnˈdræɡən/; or King Uther Welsh:Uthyr Pendragon, Uthyr Bendragon) is a legendary king of sub-Roman Britain and the father of King Arthur. A few minor references to Uther appear in Old Welsh poems, but his biography was first written down by Geoffrey of Monmouth in his Historia Regum Britanniae (History of the Kings of Britain), and Geoffrey's account of the character was used in most later versions.