I can see these becoming popular again:
BessBlanche CoraCornelia (nn
Nell?)
GlynisFrederica / Fredricka
JeanJoanMurielMyraReginaRenata -- love this one
My own list:
AdaAdela,
AdelinaBarbara -- even though I greatly dislike it
Cora,
Corinna,
Corinne -- just ripe for the taking, imo
Frances,
Francine,
Francesca -- I think
Francesca could be the next
Isabella or Sophia/Sofia.
GeorgiaJoannaRubySweet nns:
Molly,
Sally,
Nancy,
Betsy,
Nellie