Where does “ōstra” come from?

ōstra (Old High German) comes 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 “ōstra”, step by step

StepLanguageWordMeaning
1Old Norseaustreast
2Proto-Germanicaustrąeast; east, eastward
3Proto-Germanicaustrazeast, eastern
4Proto-Indo-European*h₂éwsterosin the direction of dawn, east
Every word from Proto-Indo-European *h₂éwsterosEvery word from Proto-Germanic austrazEvery word from Proto-Germanic austrą