When William Otto Waller Jr. was born on 3 April 1898, in South Point, Lawrence, Ohio, United States, his father, William L. Waller, was 37 and his mother, Martha E. “Mattie” Dawson, was 32. He married Mildred Katherine Winters on 22 September 1917, in Catlettsburg, Boyd, Kentucky, United States. They were the parents of at least 4 sons and 1 daughter. He lived in Fayette Township, Lawrence, Ohio, United States in 1900. He registered for military service in 1918. He died on 4 April 1934, in Perry Township, Lawrence, Ohio, United States, at the age of 36, and was buried in Zoar Cemetery, Coal Grove, Lawrence, Ohio, United States.