name from Mount Royal (French Mont Royal, then pronounced ), and gradually spread its name to the town, which had originally been called Ville-Marie.

In Kanien'kéha, the island is called Tiohtià:ke tsi ionhwéntsare ('broken in two', referring to the Lachine Rapids to the island's southwest) or Otsirà:ke (meaning 'on the fire'). In Ojibwe, the land is called Mooniyaang,