Matilda married William I, "The Conqueror" of England in 1050 in Castle, Angi, Normandy, France. William (son of Robert I, "The Devil Magnificent" Duke of Normandy and Harlette Herleva DeFalaise, Lioness de Conteville DeFalaise) was born on 14 Oct 1024 in Falaise, Calvados, Basse-Normandie, France; died on 9 Sep 1087 in Rouen, Seine-Maritime, Haute-Normandie, France; was buried in 1087 in Caen, Departement du Calvados, Basse-Normandie, France. [Group Sheet] [Family Chart]

1. Constance, de Bretagne was born in France; died on 13 April 1090 in Haute-Normandie, France; was buried in Redon, Departement d'Ille-et-Vilaine, Bretagne, France.
2. Cecilia, of Holy Trinity, Princess of England was born in 1056 in Caen, Departement du Calvados, Basse-Normandie, France; died on 30 July 1126 in Caen, Departement du Calvados, Basse-Normandie, France; was buried in 1126 in Caen, Departement du Calvados, Basse-Normandie, France.
3. Cecilia, de Normandie was born in 1056; died on 30 July 1126; was buried in Caen, Departement du Calvados, Basse-Normandie, France.
4. Muriel, of Normandy was born in 1060 in Normandy, France; died in 1102 in Skipton, Yorkshire, England.
5. Adela, of Normandy, Princess of England was born on 12 May 1062 in Rouen, Seine-Maritime, Haute-Normandie, France; died on 8 Mar 1137 in Rhone Alpes or Marsilly, Charente, Poitou-Charentes, France; was buried in Caen, Departement du Calvados, Basse-Normandie, France.
6. Gundred Maud, of Normandy, Lady was born on 12 Mar 1063 in France, Lot-et-Garonne, Aquitaine, France; died on 27 May 1085 in Castle Acre, Norfolk, England.
7. Agatha, de Normandie was born in 1064; died in 1080; was buried in Bayeux, Departement du Calvados, Basse-Normandie, France.
8. Henry I Beauclerc, Duke of Normandy, King of England was born on 21 Feb 1068 in Selby, Yorkshire, England; died on 1 Dec 1135 in La Forêt, Allier, Auvergne, France.