Isabelle was the daughter of unknown parents. The date and place of her birth have not been found.
She had two marriages/partners. Her first husband was Bernard Aycelin de Montaigu. They were married, but the date and place have not been found. They had no known children.
Her second husband was Guillaume IV de Mello. They were married, but the date and place have not been found. They had no known children.
Note 1
Girard de BOURBON-MONTPERROUX, seigneur de Clessy †1350 & Jeanne de CHÂTILLON-en-BAZOIS