Winifred was a teacher of one of the writers of a Perry Mason episode, and he once asked her if he could use her name for a character, since he thought real names sounded more real than made-up ones. A character named “Winifred Dunbrack” appeared in the episode “The Case of the Renegade Refugee” in 1961, played by Jennifer Howard:

http://www.imdb.com/title/tt0673370/