|William de Mowbray Sixth Baron of Thirsk Fourth Baron Mowbray
(Cir 1173-Cir 1222)
Noted events in his life were:
• Magna Carta, 1215, Runnymede, England. 2234 William was one of the 25 executors of the Magna Carta.
William married Avice de Aubigny, daughter of William d' Aubigny Third Earl Arundel, Earl Sussex, The Crusader and Mabel Meschines of Chester. (Avice de Aubigny was born in 1196 1567 and died in 1214 1567.)