Most beautiful
Derived from the Greek word 'kallistos', meaning 'most beautiful'. In Greek mythology, Callisto was a nymph and a companion of Artemis who was transformed into a bear and later became the constellation Ursa Major.
Fewer than 5 boys were named Callisto in 2025.
US births per 5-year period, 1990–present (SSA data).
A recurring antagonist and leader of the Morlocks · X-Men comics
A vengeful warrior and adversary of Xena · Xena: Warrior Princess
