Ada,
Norah and
Mabel are appearing on American naming sites, though ...
Ada not as often as
Ava but it's there;
Nora and
Norah would look more popular if you counted them together; and I'm sure I've spotted a
Mabel or three in the Telegraph's very own Birth Announcements lately! (In which case it should filter down to us plebs in ten years or so.)
I haven't tried Gurgle.com (lovely name in itself), but in one of our local (South African) papers they printed what the Telegraph showed and also reported the decline of
Richard, which had allegedly been "the top name" for boys in 1907 only to sink without trace. I can only wonder where they, or Gurgle, got their stats.