Gersenda de Marmion, dame de Fontenay le Marmion
- Born: Abt 1068, Fontenay-le-Marmion, Calvados, France (then: Fontenay-le-Marmion, Parish of Saint-Martin, Diocese of Bayeux, Duchy of Normandy, Kingdom of France)
- Marriage (1): Robert II Fitz Erneis
- Died: After 1091, Cesny-Bois-Halbout, Calvados, France (then: Cesny-Bois-Halbout, Parish of Saint-Pierre, Diocese of Bayeux, Duchy of Normandy, Kingdom of France)
FamilySearch ID: GLNC-Z7Z.
Gersenda married Robert II Fitz Erneis. (Robert II Fitz Erneis was born in 1060 in Cesny-Bois-Halbout, Calvados, France (then: Cesny-Bois-Halbout, Parish of Saint-Pierre, Diocese of Bayeux, Duchy of Normandy, Kingdom of France) and died about 1091 in Cesny-Bois-Halbout, Calvados, France (then: Cesny-Bois-Halbout, Parish of Saint-Pierre, Diocese of Bayeux, Duchy of Normandy, Kingdom of France).)
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