Mścisław

Mścisław is a traditional Slavic name, composed of the elements *mьstiti ('to avenge') and *slava ('glory, fame'). It belongs to a large category of dithematic (two-element) Slavic names, which were common among royalty and nobility in early Slavic societies. These names often carried aspirational meanings, reflecting desired qualities like strength, wisdom, or renown.

The name has been historically used in various Slavic countries, particularly Poland, Russia, and Ukraine, though its popularity has varied over centuries. In Poland, it was borne by several historical figures, including dukes and princes, solidifying its place in the national heritage. While less common in modern times compared to some other Slavic names, it retains a classic and historically significant feel.