| Saint Nicodème - Holy patron saint of the chapel | Central figure of the founding legends. |
| Guillemete d’Yvernay - Bell godmother | Noble donor of *Guillemette* (1507). |
| Olivier Martinet - Retable Sculptor | Author of the 17th century altarpiece. |
| Toussaint Cormier - Rector of Pluméliau (1649–1773) | Commander of the main table. |
| Jean Le Layec - Donor or craftsman | Mentioned on the sandstone of 1539. |
| Lois de Kerveno - Rector in 1539 | Cited in the inscription of the sandstone. |
| Gustave Geffroy - Writer and witness | Described forgiveness in 1905. |