Where does “ēn” come from?

ēn (Old Dutch) comes from Proto-West Germanic ain, from Proto-Germanic ainaz, from Proto-Indo-European óynos — one; single.

Ancestry of “ēn”, step by step

ēn traces back through two separate lines of ancestry.

via Proto-West Germanic ain

StepLanguageWordMeaning
1Proto-West Germanicainone
2Proto-Germanicainazone; some
3Proto-Indo-Europeanóynosone; single

via Proto-Germanic *ain

StepLanguageWordMeaning
1Proto-Germanic*ain—

Words derived from “ēn”

Every word from Proto-Indo-European óynos →Every word from Proto-Germanic ainaz →Every word from Proto-West Germanic ain →