- Born in 1626 in Ploërmel
- Deceased on March 2, 1702 in Saint-Malo-de-Beignon, at the approximate age of 75 years
Parents
- Thomas de Guémadeuc (c. 1587 - ), chevalier, marquis du Guémadeuc, gentilhomme ordinaire de la Chambre du Roi, gouverneur de Ploërmel
- Gillette de La Fresnaye
Occupations
- évêque de Saint-Malo