What is the meaning of Savo?

salvation, salvage

Savo Finnish, Savonian (dialect of Finnish spoken in Savo)

knowledge

reflexive possessive pronoun; belonging to the subject of the sentence (regardless of gender or number)

↑ Smoczyński, Wojciech (2007), “sãvas”, in Słownik etymologiczny języka litewskiego‎ (in Polish), Vilnius: Uniwersytet Wileński, page 1551

singular masculine genitive of savas

Source: wiktionary.org