- Born on July 12, 1728 in Penin
- Deceased the same day in this municipality, in infancy
- Burial two days later in this municipality
Parents
- François de Béthune des Planques (1693 - 1760), chevalier, comte de Saint-Venant, capitaine dans le régiment du Roi
- Marie Ernestine Josèphe de Houchin (1704 - 1764)