Note: Australia is generally considered to be a continental landmass, rather than an island. If however one does count Australia among the islands it, not Greenland, would be the largest in the world (unless one also considered Antarctica an island).
... Asia, East Africa, China, Tombouctou and other places
Nicholas Baudin[?] - 18th century French explorer, mapped the West Australian coastline.
Saint Brendan[?] - Irish ...