994 - Yes, date unknown
 | Geoffrey DE PORHOET, Viscount of Porhoet in Brittanny Bef 1093-Yes, date unknown |
| Geoffrey DE PORHOET, Viscount of Porhoet in Brittanny | |
| B: | Bef 1093 |
| D: | Yes, date unknown |
| Lady Constance DE BRETAGNE Bef 1120-Yes, date unknown |
| Lady Constance DE BRETAGNE | |
| B: | Bef 1120 |
| D: | Yes, date unknown |
| Odo DE PORHOET, Viscount of Porhoet in Brittany I | |
| B: | 1049 |
| D: | 1092 |
| Ann DE LEON 1065-Yes, date unknown |
| Ann DE LEON | |
| B: | 1065 |
| D: | Yes, date unknown |
| Josselin DE PORHOET 1025-1074 |
| Josselin DE PORHOET | |
| B: | 1025 |
| D: | 1074 |
| Alluram 994-Yes, date unknown |
| Alluram | |
| B: | 994 |
| D: | Yes, date unknown |
| Guithenoc DE PORHOET, Viscount 990-1040 |
| Guithenoc DE PORHOET, Viscount | |
| B: | 990 |
| D: | 1040 |
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