Frank was married in Aspermont to Maybelle Peacock, daughter of Wilmer and Mira Hurst Peacock, a grandaughter of one of the founders of Peacock, Texas.
His father was Walter W. Douglass and mother Etha Clay. Sons Bill and Bob Douglass. Bobby is deceased. Instrumental in forming Aspermont Peanut Dryers Inc. along with Gordon Morrow and Wad Winter. Frank was Pres. of the Coop from 1968-1978. He was one of the largest peanut growers in Stonewall County. He had one sister, Mattie Bell, and three brothers: Clay, Houston and Jack.