When Seaborn Gentry was born on 13 March 1875, in Arkansas, United States, his father, Andrew Jackson Gentry, was 39 and his mother, Margaret Margrett Catherine Bass, was 28. He had at least 3 sons and 3 daughters with Nora May Nance. He lived in Hickman Township, Scott, Arkansas, United States in 1880 and Election Precinct 55 Patt, Las Animas, Colorado, United States in 1930. He died on 6 October 1960, in Reno, Washoe, Nevada, United States, at the age of 85.