When William Oscar See was born on 29 November 1891, in Florence, Marion, Kansas, United States, his father, William Oren See, was 23 and his mother, Minnie Inez Reed, was 24. He married Grace Elliott on 24 November 1919, in Idaho Falls, Bonneville, Idaho, United States. They were the parents of at least 3 daughters. He lived in Osage, Kansas, United States in 1895 and Victoria Township, Rice, Kansas, United States in 1910. He registered for military service in 1919. He died on 20 November 1988, in Idaho Falls, Bonneville, Idaho, United States, at the age of 96, and was buried in Idaho Falls, Bonneville, Idaho, United States.