Alan fitz Fleald or Flaald; feudal Baron of Oswestry, Sheriff of Salop 1101; founder of Sporle Priory, Norfolk by 1122; married Aveline, daughter of Arnulf or Ernulf, Seigneur of Hesdin, Picardy, a large land-holder in England 1086. [Burke's Peerage]
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In the time of William the Conqueror, Alan, the son of Flathald (or Flaald) obtained, by the gift of that King, the castle of Oswaldestre, with the territory adjoining, which belonged to Meredith, Prince of Powys ap Bleddyn, King of Powys. This Alan, having m. the dau. and heir of Warine, sheriff of Shropshire, had, in her right, the Barony of Warine, and was s. by his son, William FitzAlan. [Sir Bernard Burke, Dormant, Abeyant, Forfeited, and Extinct Peerages, Burke's Peerage, Ltd., London, 1883, p. 200, Fitz-Alan, Earls of Arundel, Barons Maltravers]