Where does “Polonia” come from?

Polonia (Basque) comes from Spanish Polonia, from Medieval Latin Polonia, from Polish Polanie, from Proto-Slavic poľane, from Proto-Slavic poľe, from Proto-Indo-European pleh₂- — flat.

Ancestry of “Polonia”, step by step

StepLanguageWordMeaning
1SpanishPoloniaPoland
2Medieval LatinPoloniaPoland
3PolishPolaniePoles; field-dwellers
4Proto-Slavicpoľane—
5Proto-Slavicpoľefield
6Proto-Indo-Europeanpleh₂-flat

Words derived from “Polonia”

Every word from Proto-Indo-European pleh₂- →Every word from Proto-Slavic poľe →Every word from Proto-Slavic poľane →