| Jacut de Landoac - Founder of the monastery | Holy Breton, disciple of Budoc. |
| Guethenoc - Co-founder of the monastery | Brother of Jacut, from Wales. |
| Hinguethen - Abbé restaurateur | Reconstructed the abbey in 1008. |
| Alain III - Duke of Brittany | Mandated restoration in 1008. |
| Simon - Abbé (1274) | Associated with a prayer society. |
| Louis-Joseph Lebret - Dominican Father | Drafts a founding text in 1964. |