Adelaide, Countess of Auxerre
Encyclopedia
Adelaide of Auxerre was a daughter of Eudes of Burgundy
Eudes of Burgundy
Odo of Burgundy was Count of Nevers and Auxerre and the heir of Hugh IV, Duke of Burgundy. His mother was Yolande of Dreux.He never inherited the duchy, due to his death before his father; Burgundy was thereafter ruled by Odo's brother Robert...

 and Mathildis II of Bourbon. In 1262 she succeeded her mother as countess of Auxerre
Auxerre
Auxerre is a commune in the Bourgogne region in north-central France, between Paris and Dijon. It is the capital of the Yonne department.Auxerre's population today is about 45,000...

. In 1268 she married John I of Chalon
John I of Chalon-Auxerre
John I of Chalon-Auxerre was a son of John, Count of Chalon and his third wife Isabella van Courtenay - his brother was bishop Hugo III of Chalon. John I married Adelaide of Auxerre and they ruled jointly as count of Auxerre. John was the father of William of Chalon....

, lord of Rochefort
Rochefort
-Places:Rochefort is the name of several communes in France, of a municipality in Belgium and a commune in Switzerland:* Rochefort, Charente-Maritime, sous-préfecture in the Charente-Maritime département of France...

, son of John
John, Count of Chalon
John , called the Old , was a French nobleman, the Count of Auxonne and Chalon-sur-Saône in his own right and regent of the County of Burgundy in right of his son, Hugh III....

 - they had one child, William (died 1304).
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