Where does “trzynóg” come from?

trzynóg (Polish) comes from Polish noga, from Old Polish noga, from Proto-Slavic nogà, from Proto-Indo-European h₃nogʰ- — claw, nail; nail.

Ancestry of “trzynóg”, step by step

trzynóg traces back through two separate lines of ancestry.

via Polish noga

StepLanguageWordMeaning
1Polishnogaleg
2Old Polishnogaleg; foot
3Proto-Slavicnogàfoot, leg
4Proto-Indo-Europeanh₃nogʰ-claw, nail; nail

via Polish trzy

StepLanguageWordMeaning
1Polishtrzythree
2Proto-Slavictrьjethree
3Proto-Balto-Slavictríjesthree
4Proto-Indo-European*tréyes—
Every word from Proto-Indo-European h₃nogʰ- →Every word from Proto-Slavic nogà →Every word from Old Polish noga →