| Johannes de Croyfrooc - Witness at the trial of Saint Yves | First written mention of Coatfrec. |
| Henri de Coëtgourheden - Lord by marriage (1373) | Founded the first structures of the house. |
| Guillaume de Penhoet - Banneret and Lord of Kerimel | Anoblied in 1451 by Peter II. |
| François II de Bretagne - Duke of Brittany | Ordained the reconstruction in 1462. |
| Claude de Kerguezay - Royalist Captain | Established a garrison in 1590. |
| Guy Éder de La Fontenelle - Leader leaguer and robber | The castle was taken in 1592. |
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