I like the name
Callista, and have been comparing the two spellings (one L versus two Ls).
According to BtN,
Calista is the dominant spelling with
Callista as an alternate. I wonder if this is based on the popularity, as the one L spelling was in the Top 1000 for a few years and the two L spelling never was.
However, the name seems to be derived from either
Callistus or
Kallisto, both of which have two Ls.
So the question is- why would one-L
Calista be the dominant/preferred spelling if both of the names it could be derived from have two Ls?
I'd be interested to hear your thoughts on the two spellings. Thanks!