Despite its popularity, I still prefer
Isabella to
Arabella.
Bella is a pretty nickname, but I also like it on its own. Other names that
Bella might work as a nickname for:
Maribella
Anabella
Lucabella
Mirabella
Arabella Noelle is to rhymey for my taste. I think I'd want to pair it with something short, yet feminine. Perhaps:
Arabella RoseArabella JaneArabella Mae