Isabeau was born in 1342, the daughter of Robert III d’Ailly and Marie-Marguerite de Picquigny. The place is not known.
Her husband was Jean de Cayeux. They were married, but the date and place have not been found. Their only known child was Louise (?-?).
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Isabeau d’Ailly |
Robert III d’Ailly |
Robert II d’Ailly |
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Guillemette de Gomignies |
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Marie-Marguerite de Picquigny |
Robert de Picquigny |
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| Event | Date | Details | Source | Multimedia | Notes |
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| Birth | 1342 |
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