When Sophia Della Parker was born in February 1880, in Benton, Arkansas, United States, her father, Chesley Leonidas Parker, was 32 and her mother, Ann Belle Hastings, was 26. She married James Lawson Duncan on 9 September 1908, in Springtown, Benton, Arkansas, United States. They were the parents of at least 2 sons and 2 daughters. She died on 8 February 1952, in Mount Vernon, Skagit, Washington, United States, at the age of 72, and was buried in Mount Vernon Cemetery, Mount Vernon, Skagit, Washington, United States.