Where does “Allhalloweven” come from?

Allhalloweven (English) comes from English Even, from Middle English even, from Old English efn, from Proto-West Germanic ebn, from Proto-Germanic ebnaz, from Proto-Indo-European h₁émnos — equal, straight; flat, level, even.

Ancestry of “Allhalloweven”, step by step

StepLanguageWordMeaning
1EnglishEvenAn ethnic Even: a member of an indigenous people...
2Middle Englishevensmoothly, evenly
3Old Englishefnequal, level, even
4Proto-West Germanicebneven, level
5Proto-Germanicebnazeven, level
6Proto-Indo-Europeanh₁émnosequal, straight; flat, level, even

Words derived from “Allhalloweven

Every word from Proto-Indo-European h₁émnos