Olivier III de Clisson
Olivier III de Clisson (1280–1320), was a Breton Marche Lord and knight. Lord of Southern Brittany 
Olivier III continued expanding the de Clisson influence outside Brittany and in 1299, married Isabeau de Craon (1278 - July 30, 1350), daughter of Maurice VI de Craon. The Lords of Craon were mainly Norman with a history as former adversaries of the Dukes of Brittany. This Olivier III was now also son and heir of Jeanne Bertran, lady of Tuit, eldest daughter of Guillaume Bertran, lord of Tuit and Thury, a rich Norman heritage. Olivier III and Isabeau would eventually have five children:

 Olivier IV de Clisson in 1300;
 Amaury de Clisson, lord of Blandinais;
 Mahaut de Clisson, Dame des Earts;
 Gauthier(Garnier) de Clisson and 
 Isabelle de Clisson

References

1280 births
1320 deaths
People from Loire-Atlantique
13th-century Breton people