Ermengarde of Tonnerre

Ermengarde (c. 1032 – 1083), daughter of Renauld, Count of Tonnerre, married William I, Count of Nevers, in 1045. She had six children:

  1. Ermengarde (born 1050, date of death unknown), married Hubert I, Count of Beaumont;
  2. Robert (1052 – February 12, 1095), later Bishop of Auxerre;
  3. William II (1052–1090), inherited grandfather's title as Count of Tonnerre;
  4. Heloise (born 1056, date of death unknown), married William, Count of Évreux;
  5. Sibille (1058–1078), married Hugh I, Duke of Burgundy; and
  6. Renauld II (1059–1097), 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.

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