Il avait une relation avec Gertrude van SAKSEN.
Enfant(s):
Robert I (c. 1035 – 13 October 1093), known as Robert the Frisian, was count of Flanders from 1071 to his death in 1093. He was a son of Baldwin V, Count of Flanders and the younger brother of Baldwin VI, Count of Flanders. He usurped the countship after defeating his nephew Arnulf III and his allies, which included King Philip I of France, Count Eustace of Boulogne and the counts of Saint-Pol and Ardres at the Battle of Cassel.[1] He subsequently made peace with Philip, who became his stepson-in-law, but remained hostile to his sister Matilda and her husband William the Conqueror, who was king of England and duke of Normandy.
Early life
Robert was the younger son of Baldwin V of Flanders and Adela, a daughter of King Robert II of France.[2] His elder brother, Baldwin VI, succeeded their father as count of Flanders in 1067, and his sister Matilda had married William the Conqueror, then duke of Normandy and later king of England in 1051/2.[3
Wikipedia
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