When Eliza Jane Moore was born on 16 February 1843, in Mercer, Missouri, United States, her father, Robert Haines Moore, was 18 and her mother, Melinda Wasson, was 23. She married Joseph R. Duncan in March 1863, in Wayne, Iowa, United States. They were the parents of at least 1 son and 2 daughters. She lived in Grand River Township, Wayne, Iowa, United States for about 5 years and Marion Township, Mercer, Missouri, United States in 1900. She died on 28 July 1909, in Center Township, Decatur, Iowa, United States, at the age of 66, and was buried in Elm Cemetery, Decatur, Iowa, United States.