William I, Count of Nevers

William I, Count of Nevers (French: Guillaume I^er, c. 1029 – 20 June 1100), was the son of Renauld I, Count of Nevers and Hedwig of France, Countess d'Auxerre.^[1] He married Ermengarde, daughter of Renauld, Count of Tonnerre about 1039.^[1] William died in 1098.^[1]

William I
Count of Nevers
Born	c. 1029
Died	(1100-06-20)20 June 1100 Nevers
Spouse(s)	Ermengarde of Tonnerre
Father	Renauld I, Count of Nevers
Mother	Hedwig of France, Countess of Nevers

William I and Ermengarde:

1. Renauld II (d. 1089),^[1] succeeded his father as Count of Nevers and Count of Auxerre.
2. William II, succeeded his father as Count of Tonnerre^[1]
3. Robert (d. 1095), later Bishop of Auxerre^[1]
4. Ermengarde (d. 1090–95), married Hubert de Beaumont-au-Maine, Viscount of Maine^[1]
5. Helvise, married William, Count of Évreux^[1]