Brother-in-law of Marshall Thompson
Father of three children with Mara Corday: Carey Long (1957-2008), Gregory (b. 1960) and Valerie Long (b. 1958).
Cousin, by marriage with Suzan Ball, of Lucille Ball.
Brother of Barbara Long.
His son Carey passed away in 2008. He inherited his dad's heart problems. He outlived his dad by three years, age wise. He was 50 years old at the time of his death.
David Janssen, a friend since both were under contract with Universal-International in the early 1950s, was his neighbor in 1958. Both died in their late 40s from heart attacks.