No, Diane changed her name to keaton(her mothers maiden name)because there was already a Diane hall registered in the screen actors guild. Michael had the same problem and decided to change his name...
Although Diane Keaton's birth name is Diane Hall, "Keaton" is her mother's maiden name. Michael Keaton's birth name is Michael John Douglas, and his mother's maiden name is not "Keaton," nor did he...