Frederic G. Melcher
Melcher proposed the Caldecott Medal in 1937 to honor children's picture books. Named for British illustrator Randolph Caldecott, the medal is presented annually for the "most distinguished picture book for children".
Nicholas Mordvinoff
Nicolas Mordvinoff (September 27, 1911-1973) was a Russian-born American artist who won the 1952 Caldecott Medal for U.S. picture book illustration, recognizing "Finders Keepers", by William Lipkind. The collaborators used the pseudonym Nicolas and Will.