Callista \c(a)-llis-ta, call(i)-sta\ as a girl's name is a variant of Calista (Latin, Greek), and the meaning of Callista is "cup; fairest, most beautiful".
The baby name Callista sounds like Kallista, Callysta and Callesta. Other similar baby names are Carlista, Callida, Kallysta, Kallesta, Kalista, Calysta, Calisto, Calissa, Calesta and Kallita.