When Dedima Abigail Eaton was born on 4 May 1863, in Illinois, United States, her father, Thomas E. Eaton, was 45 and her mother, Martina Chesser, was 39. She married David Monroe Buchanan on 18 October 1883, in Blaine, Idaho, United States. They were the parents of at least 1 son. She lived in Sumner, Atchison, Kansas, United States in 1875 and Boise, Idaho, United States in 1945. She died on 10 February 1948, in Boise, Ada, Idaho, United States, at the age of 84, and was buried in Boise, Ada, Idaho, United States.