- Born on June 28, 1739 in Rennes
- Deceased on February 7, 1802 in this municipality, at the age of 62 years
Parents
- Guillaume de Rosnyvinen (1712 - 1796), marquis de Piré, président de la noblesse des états de Bretagne
- Louise de Visdelou (1713 - 1767)
Family
- Married on March 13, 1773 in Saint-Malo, with Hélène Marie Éon (1752 - 1837), dame de La Ville Bague, issuing
- Hippolyte Marie Guillaume (1778 - 1850)