Wikipedia
Montreal-South ( French: Montréal-Sud) was a suburb of Montréal located on the south shore of the St. Lawrence River founded in 1906. Montréal-Sud was created from land of the Saint-Antoine-de-Longueuil parish. Originally a village in its first five years, Montréal-Sud gained the status of city in 1911. Early in its existence, its population was split between French-speaking Roman Catholics and English-speaking Protestants. This changed by the middle of the century, as the Francophones became the overwhelming majority.
The approximate territorial limits of the city were La Fayette Boulevard in the west, Bertrand Street in the south, Joliette Street in the east and St. Lawrence River in the north.
Like neighbouring Longueuil, Montréal-Sud was an enclave of the parish Saint-Antoine-de-Longueuil (later known as Ville Jacques-Cartier).