When John William Bopp was born on 13 April 1875, in Carrigan Township, Marion, Illinois, United States, his father, Jacob Bopp, was 35 and his mother, Mary Jane Buck, was 23. He married Susan Jennette "Nettie" Steele on 29 December 1898, in Marion, Illinois, United States. They were the parents of at least 1 son and 2 daughters. He lived in Irishtown Township, Clinton, Illinois, United States in 1880 and Sandoval, Marion, Illinois, United States in 1940. He died on 13 August 1944, in Marion, Illinois, United States, at the age of 69, and was buried in Patoka, Marion, Illinois, United States.
German and Swiss German: from an ancient Germanic personal name Boppo, of uncertain origin and meaning, perhaps originally a nursery name or a short form of a personal name such as Bodobert, meaning ‘famous leader’, composed of the elements bod ‘messenger, leader’ (see Bodo ) + berht ‘bright, famous’. See also Popp .