Ingri d'Aulaire (December 27, 1904 – October 24, 1980) and Edgar Parin d'Aulaire (September 30, 1898 – May 1, 1986) were U.S. immigrant writers and illustrators of children's books who worked primarily as a team.
Bio from Wikipedia, the free encyclopedia. Photo by Unknown (OTRS submission by Per Ola d'Aulaire) [Public domain], via Wikimedia Commons.