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William of Cossonay

William of Cossonay was the second son of Louis I, lord of Cossonay in the Vaud, and Isabelle of Grandson.

A churchman, he served as prior of Perroy before ruling the Cluniac priory of Payerne in the Vaud from 1356 to 1369; he is attested there in 1356 and 1363. He was the father of Aymon de Cossonay, a young noble who founded the family's bastard branch.

References

  1. fr.wikipedia.org/wiki/Famille_de_Cossonay
  2. fr.wikipedia.org/wiki/Liste_des_prieurs_de_Payerne
  3. www.shsr.ch/mdr/MDR05_01.html