Alan Fitz Flaad, who was sometimes called Fitz Harold, because his grandmother was widow of Harold. He is first mentioned as a witness at the Court of Henry I at Windsor September 3, 1101. About 1109 Alan Fitz Flaad gave the Manor of Eaton to Norwich Priory. He married Adeliza, daughter of Warine, Sheriff of Shropshire, and had in her right the Barony of Warine. Her mother was Ameria, daughter of Roger Montgomery. Alan obtained by gift the Castle of Oswaldestre, with the territory adjoining, which had belonged to Meredith, Prince of Powis ap Bleddyn, King of Powis. Commander in the First Crusade. "The Forgotten Monarchy of Scotland" by HRH Prince Michael of Albany.