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".
Caldecott Medal
Robert Lawson alone has won both a Caldecott Medal and a Newbery Medal, the 1941 Caldecott for "They Were Strong and Good" and the 1945 Newbery for "Rabbit Hill". He both wrote and illustrated both books.