Robet was born in 1921. He was the son of Robert Hefner. He passed away in 1972.
Sources
Find a Grave, database and images (https://www.findagrave.com/memorial/179098463/robert-osborn-hefner : accessed 10 February 2022), memorial page for Robert Osborn Hefner (5 Mar 1921–24 May 1972), Find a Grave Memorial ID 179098463, citing Cedar Hill Cemetery, Brooklyn Park, Anne Arundel County, Maryland, USA ; Maintained by Regina Derrenberger (contributor 48795119) .
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