 Then known as one of the îles Sainte-Geneviève (now Dowker, Madore, and Daoust), the island was granted to governor of Montreal François-Marie Perrot by Jean Talon, in 1672, along with the île Perrot.It was acquired in 1897 by Leslie Rose Dowker (unknown-1945), who shortly afterward became Mayor of Sainte-Anne-du-Bout-de-l'Île, now known as Sainte-Anne-de-Bellevue.In the 1940s Pointe-Claire notary public Gerard Tardiff had a large summer house on the island.