Geoffrey, Duke of Brittany was born 23 September 1158 to Henry II of England (1133-1189) and Eleanor of Aquitaine (1122-1204) and died 19 August 1186 Paris, France of unspecified causes. He married Constance de Bretagne (1161-1201) July 1181 JL . William I of England (1027-1087), Henry II of England (1133-1189), Alfred the Great (849-899)/s, Charlemagne (747-814)/s, Hugh Capet (c940-996)/s, Rollo of Normandy (860-932)/s.
Geoffrey became Duke of Brittany through marriage. He was possibly killed in a tournament.
|Offspring of Geoffrey, Duke of Brittany and Constance de Bretagne (1161-1201)|
|Eleanor, Countess of Richmond (1184-1241)||1184||10 August 1241|
|Matilda of Brittany (c1185-c1185)|
|Arthur I, Duke of Brittany (1187-1203)||29 March 1187||1203|