The story
Founded by Arthur Dent in 1939.1
Aldephi was founded in 1939. In 1949 it was acquired by Arthur Dent, who ran it with his two sons, Stanley and David. Arthur Dent had been a salesman for Famous Players–Lasky and worked for producers and Sam Goldwyn, and produced Comin' Thro the Rye (1947) for Advance.
From Wikipedia’s article on Adelphi Films, shared under CC BY-SA 4.0.4