Ermengarde of Tonnerre

Who was Ermengarde of Tonnerre?

Ermengarde, daughter of Renauld, Count of Tonnerre, 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, inherited grandfather's title as Count of Tonnerre;

Heloise, married William, Count of Évreux;

Sibille, married Hugh I, Duke of Burgundy; and

Renauld II, inherited father's title as Count of Nevers.

Her husband William I was the son of Renauld I, Count of Nevers and Hedwig/Advisa of Auxerre, daughter of Robert II of France.