He inherited Brionne , becoming one of the most powerful landowners in Normandy .
Gilbert de Brionne was son of Geoffrey de Brionne , Count of Eu ( born 962 ) who was an illegitimate child of Richard I of Normandy .
Gilbert de Brionne inherited son , becoming one of the most powerful landowners in Normandy .
Gilbert de Brionne was son of Geoffrey de Brionne , Count of Eu ( born 962 ) who was an illegitimate child of Richard I of Normandy .