Cecilia1056 - 1126 Born 1056 Died Fri, 30 July 1126 Buried Abbey of Saint-Étienne, Caen Details Parents Cecilia of Normandy Lived 70 years, 29 days father William I 1028 - 1087 mother Matilda of Flanders 1031 - 1083 Siblings Brother Robert 1051 - 1134 Sister Adeliza 1052 - 1113 Brother Richard of Normandy 1054 - 1074 Brother William II 1057 - 1100 Sister Constance of Normandy 1057 - 1090 Sister Matilda 1061 - 1086 Sister Adela of Normandy 1067 - 1137 Brother Henry I 1068 - 1135 Sister Agatha 1070 - 1100