Paul Alling Sperry born in New Haven, Connecticut, the second of three sons born to Nettie Alling Sperry and Sereno Clark Sperry. His younger brother, Armstrong Wells Sperry, was a writer and illustrator of children’s literature, best known for his 1941 Newbery Medal-winning book, Call It Courage. Sperry’s father was a native of New Haven who served in leadership positions for several companies in the area, including the William Wells Company, the United States Finishing Company and the Pond Lily Company. His grandfather, William Wallace Sperry was a shipbuilder and served as a sergeant major in the 13th Connecticut Infantry Regiment during the American Civil War.