My first thought was that it looked French but I can't find anything for it online. My second guess is that it was someone's surname and she was named after them. Interesting. There's always that one name in a family that can't be traced!
Unrelated, but
Florence Emily is a beautiful combo, and I don't even care for
Florence.
https://youtube.com/@MarioDrama632 or
https://youtube.com/@Objects_2763 :3