Leif Erikson
Leif Erikson or Leif Ericson ( 970 – c. 1020) was a Norse explorer from Iceland. He was the first known European to have set foot on continental North America (excluding Greenland), before Christopher Columbus. According to the Sagas of Icelanders, he established a Norse settlement at Vinland, tentatively identified with the Norse L'Anse aux Meadows on the northern tip of Newfoundland in modern-day Canada. Later archaeological evidence suggests that Vinland may have been the areas around the Gulf of St. Lawrence and that the L'Anse aux Meadows site was a ship repair station.
Joseph Fischer (cartographer)
Joseph Fischer, S.J. (; 19 March 1858 – 26 October 1944) was a German clergyman and cartographer. Fischer had an eminently successful career as a cartographer, publishing old maps. In 1901, while he was investigating the Vikings' discovery of America, he accidentally discovered the long-lost map of Martin Waldseemüller, dated 1507. This map, which claims to update Ptolemy with the voyages of Amerigo Vespucci, is the first known to display the word "America". The map was purchased from its owner by the United States Library of Congress in 2001 for ten million dollars.