Maybe not for the main character, but names that were likely at the time (and if not other character in the story, could be good for a middle for protagonist to balance an intense first):
[name_f]Joan[/name_f]
[name_f]Jean[/name_f]
[name_f]Joyce[/name_f]
[name_f]Patricia[/name_f]
[name_f]Shirley[/name_f]
[name_f]Marjorie[/name_f]
[name_f]Kathleen[/name_f]
[name_f]Lorraine[/name_f]
[name_f]Margaret[/name_f]
[name_f]Delphine[/name_f]
[name_f]Aileen[/name_f]
[name_f]Esmé[/name_f]
[name_f]Gladys[/name_f]
[name_f]Gloria[/name_f]