| | Marie Catherine de Saint-Gouesnou 1365– | | |
| | | | | | Jean Ier le Barbu 1305–1369 Constance de Penhoët 1310– | | | | | Guillaume II de Penhoët 1280–1328 Constance de Kerouzéré 1280–1330 | | | | Hervé II de Penhoët 1260–1321 Anne du Chastel 1262–1296 | | | | Hervé 1er de Penhoët 1240–1284 Jeanne Marie de Kermavan 1245–1282 | | |
| | | Bernard du Chastel 1230–1288 Constance de Léon 1234–1290 | | |
|
|
| | | Yvon de Kerouzéré 1255–1310 | | | | | Alain de Coëtmen 1200–1260 | | |
|
|
|
|
|
|
| | | | | | | Arthur de Kerouartz –1320 | | | | Audran de Kerouartz –1290 | | | | Soudan de Kerouartz –1260 | | |
|
|
|
|
|
|
|
|