- Born on February 2, 1750 in Paris
- Deceased on April 28, 1790, at the age of 40 years
Parents
- Pierre-Paul d'Ossun (1713 - 1788), chevalier, grande de España, maréchal de camp, capitaine-lieutenant de cavalerie
- Thérèse Louise Hocquart de Montfermeil (1731 - 1750)
Family
- Married on February 10, 1766 in Paris, with Geneviève de Gramont (1750 - 1794), dame d'atours et amie intime de la Reine Marie-Antoinette, issuing
Sophie-Pauline (1772 - 1845)
Occupations
- maréchal de camp
- colonel et mestre de camp du régiment Royal des Vaisseaux