Where does “eingi” come from?

eingi (Old Norse) comes from Old Norse einn, from Proto-Germanic ainaz, from Proto-Indo-European óynos — one; single.

Ancestry of “eingi”, step by step

StepLanguageWordMeaning
1Old Norseeinnone; some, a few
2Proto-Germanicainazone; some
3Proto-Indo-Europeanóynosone; single
Every word from Proto-Indo-European óynos →Every word from Proto-Germanic ainaz →Every word from Old Norse einn →