- Born on June 29, 1726 in La Forêt-Fouesnant
- Deceased on February 16, 1779 in Quimper, at the age of 52 years
Parents
- François-Joseph de Guernisac (1688 - 1731), chevalier, baron de Goarlot
- Pétronille-Angélique de Kermellec (1692 - 1762)
Family
- Married on September 13, 1762 in Leuhan, with Marie Françoise Euzenou de Kersalaün (1745 - ), issuing
Catherine (1764 - )- Ange-Joseph (1766 - 1846)
- Renée-Josèphe (1775 - 1836)
- Armand (1776 - )
Occupations
- capitaine de hussards