- Born on March 20, 1737 in Érin
- Deceased on November 29, 1801 in Aire-sur-la-Lys, at the age of 64 years
Parents
- Guillaume François de Croÿ (1687 - 1764), marquis de Molembais
- Anne Françoise Amélie Josèphe de Trazegnies (1719 - 1804)
Family
- Married on September 1, 1767 in Érin, with Gillion Charles Joseph de Trazegnies ( - 1793), marquis de Bomy, maréchal de camp