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).
... (1899-2001), Norwegian, Danish explorer, Governor of Greenland
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Louis Joliet, (1645-1700)
Richard Jobson
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Jean François La Pérouse, (1741-1788), French explorer ...