When Eliza Buchanan was born in 1816, in Switzerland, Indiana, United States, her father, William John Buchanan, was 38 and her mother, Tabitha Freeman, was 44. She married Wilson Benefield on 30 April 1831, in Switzerland, Indiana, United States. They were the parents of at least 2 sons and 5 daughters. She lived in Madison, Madison Township, Jefferson, Indiana, United States in 1850. She died after 1850, in Jefferson, Indiana, United States, at the age of 35.