Tarzan Finds a Son! (1939)

Director: Richard Thorpe
Cast: Frieda Inescort, Henry Stephenson, Henry Wilcoxon, Ian Hunter, Johnny Sheffield, Johnny Weissmüller, Laraine Day, Maureen O'Sullivan

Synopsis:

A young couple die in a plane crash in the jungle. Their son is found by Tarzan and Jane who name him Boy and raise him as their own. Five years later a search party comes to find the young heir to millions of dollars. Jane agrees, against Tarzan’s will, to lead them to civilization.