When Sylvia Mae Radmall was born on 16 September 1905, in Pleasant Grove, Utah, Utah, United States, her father, John Henry Radmall, was 22 and her mother, Esther Jane Deveraux, was 17. She married Harry Leroy Mooney on 27 December 1926, in Idaho Falls, Bonneville, Idaho, United States. They were the parents of at least 1 daughter. She lived in Idaho Falls, Bonneville, Idaho, United States in 1920 and Idaho Falls Election Precinct 5, Bonneville, Idaho, United States in 1940. She died in April 1990, in Pocatello, Bannock, Idaho, United States, at the age of 84, and was buried in Mountain View Cemetery, Pocatello, Bannock, Idaho, United States.