| Person | Spouse | Relationship | Most recent common ancestor(s) |
|---|---|---|---|
| Geoffroy III de Mayenne | Constance de Cornouaille | 2nd cousins once removed | Lancelin II de Beaugency & Paule (Adelberge) du Maine |
3rd cousins |
Alain III de Cornouaille & Judith de Nantes |
| Person | Spouse | Relationship | Most recent common ancestor(s) |
|---|---|---|---|
| Geoffroy III de Mayenne | Constance de Cornouaille | 2nd cousins once removed | Lancelin II de Beaugency & Paule (Adelberge) du Maine |
3rd cousins |
Alain III de Cornouaille & Judith de Nantes |