Where does “ប៉ូឡូញ” come from?

ប៉ូឡូញ (Khmer) comes from French Pologne, from Latin Polonia, from Proto-Slavic poľane, from Proto-Slavic poľe, from Proto-Indo-European pleh₂- — flat.

Ancestry of “ប៉ូឡូញ”, step by step

StepLanguageWordMeaning
1FrenchPologne—
2LatinPoloniaPoland
3Proto-Slavicpoľane—
4Proto-Slavicpoľefield
5Proto-Indo-Europeanpleh₂-flat
Every word from Proto-Indo-European pleh₂- →Every word from Proto-Slavic poľe →Every word from Proto-Slavic poľane →