I would go with a simple, classic middle name. I think the name
Crescentia is okay. Kind of interesting, but it makes me think of "scent" of perfume.
Crescenta
RoseCrescenta
MayCrescenta
GraceCrescenta
FayCrescenta
BelleCrescenta
LakeCrescenta
Pearl
I think Crescenta
Pearl is my favorite. I would go with a classic maybe even a filler middle name. It complements
Crescentia well as it is so unusual.