Soldier. Served as a musketeer and as captain of dragoons.
Descendant of a noble family, British by origin, that had settled in St.-Domingue. Believed that his family was related to William Alexander, Lord Stirling.
Born at St.-Domingue. Brother of comte Louis-Maximilien Alexandre d’Hanache, known as the chevalier d’Hanache. Married to Charlotte-Françoise le Féron (1768).