Camilla /
Camille is not floral. It is an ancient
Roman name.
Camelia is the flower / floral name. It has a slightly different pronunciation that you might like better than
Camilla. Would
Camelia work any better?
But back to your issue about
Millie.
Millie is an adorable nn. Other names it could be from include:
Amelia /
Emilia / Emiliane /
EmilyMilaMatildaMahaliaMelinaMireille ("meer-AY-uh")
EmmelineMelisande (French form of
Millicent)
MelusineMalaikaMelodyMelanieMileva ("mi-LAY-vuh")(Einstein's first wife)
Some of these are a bit of a stretch, admittedly. But nns aren't an exact science so I'm pretty fast and lose with my diminutives. Please let us know if you find something that works. Thanks!