Isabeau married Geoffroy de Châteaubriant Abt 1290. Geoffroy (son of Geoffroy de Châteaubriant and Belle-Assez de Thouars) was born Abt 1258; died 4 Apr 1301. [Group Sheet]
Eustaisse married Olivier de Tinténiac Abt 1305. Olivier (son of Olivier de Tinténiac and Havoise d'Avaugour) was born Abt 1285. [Group Sheet]
Jean married Jeanne de Dol Abt 1325. Jeanne (daughter of Jean de Dol) was born Abt 1305. [Group Sheet]
Isabeau married Jean de Laval Abt 1350. Jean (son of André de Laval and Eustachie de Bauçay) was born Abt 1320; died 1398. [Group Sheet]