The first known European sighting of the cape was by Bruni d'Entrecasteaux in 1791. d'Entrecasteaux thought the cape was an island, and named it "Isle St Allouarn" ("St Allouarn Island"), in honour of Captain de St Aloüarn. Ten years later, Matthew Flinders began his survey of the South coast of New Holland from Cape Leeuwin in 1801 when he named it. Flinders landed in the bay to the east of Cape Leeuwin, today's Flinders Bay. Flinders was aware that the area had been known to the Dutch as "Leeuwin's Land".