When Pony R. Clapp was born on 10 June 1898, in Graves, Kentucky, United States, his father, William Terry Adams Clapp, was 34 and his mother, Martha Jane Waggoner, was 27. He married Earleen Oren Allison on 15 March 1919, in Paris, Henry, Tennessee, United States. They were the parents of at least 1 son and 2 daughters. He lived in McCracken, Kentucky, United States in 1935 and Magisterial District 2, McCracken, Kentucky, United States in 1940. He died on 10 November 1974, in Paducah, McCracken, Kentucky, United States, at the age of 76, and was buried in Symsonia Cemetery, Mayfield, Graves, Kentucky, United States.