Probably son of Siward. Married Philippa Basset (d.1265), with whom he had a son Richard, who was under age at the time of his father's death. Also had a bastard son, Daniel. Was given castle and lordship of Kellie and other lands in Aberdour, FIF, by Alexander II of Scotland. [http://www.oxforddnb.com/view/article/37971]