, Cecilia
| Birth Name | Cecilia 1 | 
| Gender | female | 
| Age at Death | 70 years, 6 months, 5 days | 
| Birth date | 1056 | 
| Death date | 6 July 1126 (Caen, Calvados, Basse-Normandie, France) | 
Events
| Event | Date | Place | Description | Sources | 
|---|---|---|---|---|
| Birth | 1056 | 1 | ||
|  | ||||
| Death | 6 July 1126 | Caen, Calvados, Basse-Normandie, France | 1 | |
|  | ||||
| Burial | Caen, Departement du Calvados, Basse-Normandie, France | 1 | ||
|  | ||||
Parents
| Relation to main person | Name | Birth date | Death date | Relation within this family (if not by birth) | 
|---|---|---|---|---|
| Father | Normandie, William de The Conqueror | 4 October 1028 | 11 November 1087 | |
| Mother | Flanders, Mathilda de | 1030 | 3 November 1083 | |
| Brother | Curthose de Normandy, Robert | 1051 | 3 February 1134 | |
| Sister | van Engeland, Gundrade | about 1053 | 27 May 1085 | |
| Brother | Normandie, Richard De | 1056 | 1081 | |
| , Cecilia | 1056 | 6 July 1126 | ||
| Sister | Normandy, Constance de | 1057 | 13 August 1090 | |
| Brother | Rufus, William II King of England | 1057 | 2 August 1100 | |
| Sister | Normandie, Agatha Matilda de | 1064 | 1080 | |
| Sister | Beauclerc, Adeliza | 1066 | 8 March 1138 | |
| Brother | Beauclerc, Henry King of England I | 21 February 1068 | 1 December 1135 | 
Families
| Family of Langtot, Ralph De and , Cecilia | ||
| Unknown | Partner | Langtot, Ralph De ( * 1060 + ... ) | 
 
										 
										 
										 
										 
										 
										 
										 
										