Here is a sidebar I wrote about Lee Scoresby in my The Definitive Guide: Philip Pullman’s His Dark Materials: The Original Trilogy.
His name is derived from two sources: Lee Van Cleef and William Scoresby, Sr. and Jr.
Lee Van Cleef was an actor who appeared in a number of Westerns, including High Noon; The Good the Bad, and the Ugly; The Magnificent Seven; For a Few Dollars More, and other tales of bounty hunters, desperadoes, and treasure hunters — all variations on the theme of outlaws and lawmen in the Wild West.
William Scoresby, Sr. (1760-1829) of Whitby, North Yotkshire, captained whaling ships in arctic waters. In 1806, when Scoresby Sr., navigating through the ice off Spitzbergen, the largest of Svalbard’s islands (Svalbard ranges from 81º N to 74º N) made it to 81º N, he had gone further toward the North Pole than any white person before him. His record was broken by Sir William Parry (!), who traveled to 82º N.
William Scoresby, Jr. (1789-1857) began his arctic explorations aboard his father’s whalers and made yearly explorations off the coast of Greenland from 1803-1822, gaining renown as a scientist. In 1820 he published An Account of the Arctic Regions, which laid the foundation for future arctic studies in geography, natural history, and physical sciences.
Scoresby Jr. was the first to show that the temperature of arctic water is warmer below than on the surface. Terrestrial magnetism was one of his particular interests, which he continued to study even after ceasing his arctic explorations in 1823 and becoming ordained as an Anglican clergyman in 1825. He devised improvements in compass needles at the request of the British Admiralty, lectured in America, and in 1856 journeyed to Australia to make observations on magnetism in the southern hemisphere. His accomplishments as a mapmaker led to a large area off Greenland’s east coast being named Scoresby Sound in his honor, and there is a Scoresby, Victoria, Australia, commemorating his southern travels.