Annabell is a name that can be broken down into two different names.
According to Wikipedia, Anna is a Latin form of the Greek: Ἄννα and the Hebrew name
Hannah (Hebrew: חַנָּה Ḥannāh ), meaning "favor" or "grace" or "
beautiful".
The other part is “Belle”, which is French for
beautiful.
If you put them together to create Annabell, it actually means “Favored Grace”, which is fun.
Tl;dr, Annabell means favored grace.