Where does “ööeitsi” come from?

ööeitsi (Ingrian) comes from Ingrian öö, from Proto-Finnic öö, from Proto-Finno-Ugric üje.

Ancestry of “ööeitsi”, step by step

ööeitsi traces back through two separate lines of ancestry.

via Ingrian öö

StepLanguageWordMeaning
1Ingrianöönight
2Proto-Finnicöönight
3Proto-Finno-Ugricüje—

via Ingrian eitsi

StepLanguageWordMeaning
1Ingrianeitsiherding of horses during the night
Every word from Proto-Finno-Ugric üje →Every word from Proto-Finnic öö →Every word from Ingrian öö →