Hugues le Poitevin’s Histoire de Vézelay records that Louis VII King of France attacked “Guilelmum comitem Cabilonensem” in reprisal for the attacks by “Guilelmus filius eius” against Cluny, in late 1165.
He succeeded his father as Comte de Chalon. "Willelmus comes Cabilonensis" granted exemptions to Cluny by charter dated [1180]. "Philippus Francorum rex" confirmed a settlement of a dispute concerning "domum de Paredo" between "comes Cabilonensis Willelmus et pater suus" and the abbey of Cluny by charter dated [1 Nov 1180/4 Apr 1181]. These two documents presumably resolved the long-standing enmity between the comtes de Chalon and Cluny, although the texts do not refer to the previous problems. He went to Jerusalem in 1189.
The necrology of Saint-Vincent records the death "III Non Jan" of "W Cabilonensis comes", adding "et pro filia sua comitissa".
The name of Guillaume's wife is not known. 1
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