Where does “Полина” come from?

Полина (Russian) comes from French Pauline, from Latin Paulina, from Latin Paulinus, from Latin -īnus, from Proto-Italic -īnos, from Proto-Indo-European -iHnos, from Proto-Indo-European -no- — adjectival suffix.

Ancestry of “Полина”, step by step

StepLanguageWordMeaning
1FrenchPauline—
2LatinPaulina—
3LatinPaulinusa Roman cognomen
4Latin-īnusof or pertaining to; -ine
5Proto-Italic-īnosof/belonging to
6Proto-Indo-European-iHnosCreates adjectives of materials
7Proto-Indo-European-no-adjectival suffix
Every word from Proto-Indo-European -no- →Every word from Latin -īnus →Every word from Proto-Italic -īnos →