You already know that Alfred Hitchcock directed an acclaimed film adaptation of Rebecca. Did you also know that Hitchcock's film The Birds is adapted from a short story by Daphne du Maurier story with the same name?
Daphne du Maurier's grandfather, George du Maurier, was a famous author and friends with J.M. Barrie, creator of Peter Pan, the boy who never grows up. (Source.)
We knew gender was a big theme in Rebecca, but get this: Daphne du Maurier used to dress as a boy and had a male alter-ego named Eric Avon (Source.)