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William IX of Auvergne

William IX was count of Auvergne in the late twelfth century, the son of Count Robert IV and Mahaut of Burgundy. The chronicle of Alberic of Trois-Fontaines names him together with his brothers Guy II and Robert.

He is mentioned in an entry of 1199 and died without known issue around that year, when his brother Guy II succeeded him as count.

References

  1. en.wikipedia.org/wiki/William_IX_of_Auvergne
  2. fr.wikipedia.org/wiki/Guillaume_IX_d'Auvergne