From South America, an Underworld being: Anhangá is the name of the Guarani evil god of the underworld, who was sent there by Tupã, the main god of the Guarani mithology, after he lost the great battle between good and evil.
From Europe, a scientist: Andrew Hollis 1947-2005 was the founding director of the Minor Planets Section of the British Astronomical Association (later the Asteroids and Outer Planets section) and ran it for over 20 years. He was a member of the BAA for 44 years and together with the overall director Richard Miles provided encouragement for amateur astronomers throughout the country. He published numerous papers including "From the darkness emerging: Pluto and the Edgeworth-Kuiper belt" in 1999 In which he talks about the window of opportunity for a space probe mission to Pluto.
From North America, a historic explorer: According to Maori folklore, Kupe was the leader of a polynesian group that set out from Tahiti and discovered New Zealand. According to the website named below, the name may attach to two individuals, one flourishing around the year 925, the other around 1300. So it's hard to say whether Kupe was a historic explorer. But he's not fictional, either, and perhaps his name can represent (among others) the ancient Polynesians, who, in crisscrossing the Pacific by outrigger canoe, were among the greatest explorers the world has ever seen.
From North America, a fictional traveler: Eleanor Arroway is the protagonist in Contact by Carl Sagan. In the novel, she was the first to receive a message from an extraterrestrial intelligence, instructions to build a machine assumed to be a vehicle. Later, she enters the machine herself and travels to the center of the galaxy, risking her life to learn more about the universe.
From Europe, a historic explorer: Piri Reis, the first world map drawer! He is primarily known today for his maps and charts collected in his Kitab-ı Bahriye (Book of Navigation), a book that contains detailed information on navigation, as well as very accurate charts (for their time) describing the important ports and cities of theMediterranean Sea. He gained fame as a cartographer when a small part of his first world map (prepared in 1513) was discovered in 1929 at the Topkapı Palace in Istanbul. His world map is the oldest known Turkish atlas showing the New World, and one of the oldest maps of America still in existence anywhere (the oldest known map of America that is still in existence is the map drawn by Juan de la Cosa in 1500). Piri Reis' map is centered on the Sahara at the latitude of the Tropic of Cancer. In 1528, Piri Reis drew a second world map, of which a small fragment (showing Greenland and North America from Labrador and Newfoundland in the north to Florida, Cuba, Hispaniola, Jamaica and parts ofCentral America in the south) still survives. According to his imprinting text, he had drawn his maps using about 20 foreign charts and mappae mundi (Arab, Spanish, Portuguese, Chinese, Indian and Greek) including one by Christopher Columbus.
From North America, an Underworld locale: Z'ha'dum is the homeworld of the Shadows, Babylon 5's ancient, highly evolved, manipulative, "evil" race; it is the science fictional equivalent of a Hadean underworld. Z'ha'dum is also the location of Captain John Sheridan's self-sacrificial death and eventual resurrection at the hands of a vastly more ancient being.