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Male Guillaume I de Thiern comte de Chalon-sur-Saone Click to view Guillaume I de Thiern comte de Chalon-sur-Saone in the family tree

Guillaume I's father was Guy III de Thiern.  His paternal grandparents were Geoffroy II de Semur-en-Broinnais sge de Donze, cte de Chalon and Mathilde (Mahaut) de Chalon de Vergy dame de Donzy. He had a brother and a sister, named Guy IV and Isabelle.  He died in 1168.


Guillaume I's family

He had a biological son and three biological daughters, named Guillaume II, Agnes, Alix and Beatrix.

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