When Euphama Dunsmoor was born on 24 November 1844, in Fairfield Township, Washington, Ohio, United States, her father, Horace Dunsmoor, was 45 and her mother, Jane Bishop, was 37. She married John G. Sibert on 20 September 1866, in Washington, Ohio, United States. They were the parents of at least 1 son and 1 daughter. She lived in Forreston, Ogle, Illinois, United States in 1870 and Reinbeck, Grundy, Iowa, United States in 1880. She died on 19 September 1917, at the age of 72, and was buried in Reinbeck, Grundy, Iowa, United States.