Where does “fejünkbe” come from?

fejünkbe (Hungarian) comes from Hungarian fej, from Proto-Uralic päŋe — head.

Ancestry of “fejünkbe”, step by step

StepLanguageWordMeaning
1Hungarianfejhead; head, mind, brain, intellect; heads,...
2Proto-Uralicpäŋehead
Every word from Proto-Uralic päŋeEvery word from Hungarian fej