Hmmm... I think the eldest girl in Sound of Music was
Louisa, but there was a
Brigitta!
I hear Kinsey mentioned as a possible name now and again... but it always makes me think of
Alfred Kinsey and his sex research that came out in the 1950s! There was a movie put out about it a few years ago, too (just called Kinsey).
Best of luck-- hope you can settle on the names you like!