Where does “Oster” come from?

Oster (English) comes from Swedish öster, from Danish øster, from Old Norse austr, from Proto-Germanic austrą, from Proto-Germanic austraz, from Proto-Indo-European *h₂éwsteros — in the direction of dawn, east.

Ancestry of “Oster”, step by step

Oster traces back through two separate lines of ancestry.

via Swedish öster

StepLanguageWordMeaning
1Swedishöstereast; one of the four major compass points; east;...
2Danishøster
3Old Norseaustreast
4Proto-Germanicaustrąeast; east, eastward
5Proto-Germanicaustrazeast, eastern
6Proto-Indo-European*h₂éwsterosin the direction of dawn, east

via Ukrainian Осте́р

StepLanguageWordMeaning
1UkrainianОсте́р
Every word from Proto-Indo-European *h₂éwsterosEvery word from Proto-Germanic austrazEvery word from Proto-Germanic austrą