Claim: The title Baron de Longueuil was granted to Charles Le Moyne in 1657, and when he died in Montreal in 1729, the barony,  the rank of a baron,  was passed to his son.
Evidence: The Seigniory of Longueuil was first granted in 1657 to Charles Le Moyne de Longueuil et de Châteauguay, Sieur de Longueuil, and was raised to the label of Barony of Longueuil in 1700 by Louis XIV in recognition of Le Moyne's services. Charles Le Moyne died in Montreal in 1729, and the barony passed to his son, also named Charles Le Moyne (1687–1755), the second baron. Barony, the peerage or office of a baron