Donovan was a half brother of Leonidas M., Raymond Delancey, Arthur James, and Ella Roberta (Ferguson) Barnum. He was a steam engineer.
California Death Index, 1940-1997 about Donovan Barnum. Name: Donovan Barnum; Social Security #: 553-28-2188; Sex: Male; Birth Date: 23 Jan 1906; Birthplace: Michigan; Death Date: 4 Jun 1983; Death Place: Los Angeles; Mother's Maiden Name: Melching.
Social Security Death Index about Donovan Barnum. Name: Donovan Barnum; SSN: 553-28-2188; Last Residence: 91360 Thousand Oaks, Ventura, California of America; Born: 23 Jan 1906; Died: Jun 1983; State (Year) SSN issued: California (1952).
He died of complications (medical errors) following heart surgery.