Where does “Oosterwei” come from?

Oosterwei (Dutch) comes from Dutch wei, from Middle Dutch wei, from Old Dutch wei, from Proto-West Germanic *hwaij — whey.

Ancestry of “Oosterwei”, step by step

StepLanguageWordMeaning
1Dutchweia product obtained from milk; whey; Alternative...
2Middle Dutchwei—
3Old Dutchwei—
4Proto-West Germanic*hwaijwhey
Every word from Proto-West Germanic *hwaij →Every word from Old Dutch wei →Every word from Middle Dutch wei →