Ermengarde of Tonnerre

Ermengarde, daughter of Renauld, Count of Tonnerre and Herviz, married William I, Count of Nevers in 1045. She had six children:Ermengarde, married Hubert I, Count of Beaumont Robert, later Bishop of Auxerre William II (1052–1090), inherited grandfather's title as Count of Tonnerre Heloise, married William, Count of Évreux Sibille (1058–1078), married Hugh I, Duke of Burgundy Renauld II (1059–1089), inherited father's title as Count of Nevers.

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