When William Sheffield Parker was born on 18 December 1890, in Atascosa, Texas, United States, his father, John Nathaniel Parker, was 45 and his mother, Saphronia Susan Pierce, was 34. He married Callie D Collins on 3 February 1912, in Bexar, Texas, United States. He lived in San Patricio, Texas, United States in 1935 and Justice Precinct 2, DeWitt, Texas, United States in 1940. He died on 6 February 1969, in Atascosa, Texas, United States, at the age of 78, and was buried in Poteet, Atascosa, Texas, United States.