When John William Gedney II was born on 5 June 1880, in Windsor, Henry, Missouri, United States, his father, John William Gedney Sr, was 33 and his mother, Elizabeth Allen, was 32. He married Jesse May Melvin on 4 September 1900, in Windsor, Henry, Missouri, United States. They were the parents of at least 3 sons and 3 daughters. He lived in La Plata, Colorado, United States in 1910 and Election Precinct 9 Bayfield, La Plata, Colorado, United States in 1940. He died on 7 January 1954, in Durango, La Plata, Colorado, United States, at the age of 73.