The screenwriter of Son of Dracula, Jay Fairbank was actually actress Jennifer Jayne.

 

Born in 1932, her real name is Jennifer Jones. Her acting credits include The Trollenberg Terror (1958), Raising the Wind (1961), Dr. Terror's House of Horrors (1965), They Came From Beyond Space (1967), The Medusa Touch (1978), and The Doctor and the Devils (1985). In addition to Son of Dracula, Fairbank also wrote the screenplay for Tales That Witness Madness (1973).