Where does “Oder” come from?

Oder (English) comes from German oder, from Middle High German oder, from Old High German odar, from Old High German odo, from English eddo — A plant (Colocasia esculenta, but often identified as Colocasia antiquorum, among numerous other synonyms), which is usually considered a variety of C. esculenta, with edible starchy tubers.

Ancestry of “Oder”, step by step

StepLanguageWordMeaning
1Germanoderor; right?; is it?; is it not?
2Middle High Germanoder
3Old High Germanodaror
4Old High Germanodopossibly, about, perhaps
5EnglisheddoA plant (Colocasia esculenta, but often identified as Colocasia antiquorum, among numerous other synonyms), which is usually considered a variety of C. esculenta, with edible starchy tubers
Every word from English eddoEvery word from Old High German odoEvery word from Old High German odar