• General Notes

  William married Adela (or Ela), daughter of William Talvas, count of Ponthieu, by Helie (Ella) daughter of Odo I, Duke of Burgundy.[8] They had one child, a daughter, Isabel, who was his heir.[9] She married first William of Blois, second son of king Stephen, and who became earl of Warenne or Surrey. After he died without children in October 1159, she married Hamelin, half-brother of Henry II, who also became Earl of Warenne or Surrey.[10] He took the de Warenne surname, and their descendants carried on the earldom.[11

Details of Adela's family with William de Warenne (3rd Earl of Surrey)