1329). Olivier had a son, Jean, from this first marriage, who would go on to inherit his mother's lands as the Lord of Milly, near Paris.

Jeanne, a recent widow herself of the Lord of Châteaubriant, controlled areas in Poitou just south of the Breton border from Beauvoir-sur-Mer in the west to Châteaumur in the southeast of Clisson. In the marriage contract,