I know, silly high school stuff, but the female lead character in Mr. and Mrs. Bo Jo Jones is named July. They changed it in the movie to Julie, but in the book she said she was named for the month.
April, May, and June were the names of Daisy Duck’s nieces … not very popular or successful, but trying to set up a female counter to Huey, Dewey, and Louie.
There was also a July in the book version of Annie, for basically the same reason if I recall correctly. But then it’s been over 20 years ago so I may be remembering the details wrong.
May Wellend or Weiland (Oh, come on Self. It’s a classic book that was made into a movie with Winona Rider and Michelle Pfeiffer, as the Countess Olenska. May’s fiance’ was Archer and there was an eccentric, fat aunt. This is ridiculous…why can’t I come up with the title of this book?) Is is The Age of Innocence?