 Sour was a son of Arthur W. Sour (1895–1972), a native of Gretna in Jefferson Parish,
and the former Adele Elizabeth Diez (1897–1977), a native of Reserve in St. John the Baptist Parish.One of Sour's sisters, Louise Pasquier, the widow of Charles F. Pasquier, Sr., was among the founders of St. Joseph Catholic Church in Shreveport.Another sister, Adele Hoisington (1917-1945), named for her mother, was a former bank employee, who died with her husband, Earl L. Hoisington (1910-1945), in an automobile accident near Willard in Huron County in northern Ohio, while the couple was on their honeymoon.