William de Warenne (1166-1240)

William de Warenne (1166-1240) 6th Earl of Surrey Otherwise known as William Plantagenet.

William was the son of Hamelin de Warenne (Plantagenet) and Isabel de Warenne, daughter of William de Warenne, 3rd Earl of Surrey. His father Hamelin granted him the manor of Appleby, North Lincolnshire.

Vital Statistics
He married Maud Marshal (1192 - 27 March 1248), eldest daughter and later co-heiress of William Marshal, and widow of Hugh Bigod, 3rd Earl of Norfolk, thus becoming by marriage the Earl of Salisbury, on October 13, 1225.

William may also have had an earlier, childless marriage to another Matilda, daughter of William d'Aubigny, 1st Earl of Arundel.

Biography
His first tenure of office as Lord Warden of the Cinque Ports began in 1204, and lasted until 1206. He was also a Warden of Welch marches between 1208-1213.
 * [Wikipedia Entry for William de Warenne]

William was one of the few barons who remained loyal to King John (who was his cousin) during the king's difficulties with the barons, when they sought for the French prince to assume the English throne, and is listed as one of those who advised John to accede to the Magna Carta. His allegiance only faltered a few times when the king's cause looked hopeless.

In March, 1217 he again demonstrated his loyalty to England by supporting the young King Henry III, he was also responsible for the establishment of the cathedral at Salisbury.

Between the years 1200-1208, and during 1213-1226 he was to serve as the Sheriff of Wiltshire. In 1214 he was again appointed Lord Warden of the Cinque Ports.

Children of William de Warenne and Maud Marshal

 * John de Warenne, 7th Earl of Surrey (1231-1304) succeeded his father as earl.
 * Isabel de Warenne (c. 1228 - 1282), married Hugh d'Aubigny, 5th Earl of Arundel.