Antoine Le Moyne de Châteauguay was born on 17 July 1683 in Montreal, French Canada.
[1] His parents were Charles Le Moyne (1626–85), seigneur de Longueil, a soldier, interpreter and merchant, and Catherine Thierry.
[2] His father had served in the war with the Iroquois and helped considerably in pacifying New France and defending its frontiers.
[6] Châteauguay accompanied his brother Iberville on an expedition to the lower Mississippi valley that left Brest in 1698 and anchored in Mobile Bay on 31 January 1699.
[4] In a memorial written by Bienville at New Orleans on 25 January 1723 he states that only four of the brothers were still alive: himself, Baron de Longueil, Serigny and Chateauguay.
[10] Châteauguay was appointed governor of Île Royale (Cape Breton) in 1745, but died before taking office.