Where does “Ostpreußin” come from?

Ostpreußin (German) comes from German Ostpreuße, from German ōst, from Middle High German ōst, from Old High German ōst, 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 “Ostpreußin”, step by step

StepLanguageWordMeaning
1GermanOstpreußea person from East Prussia
2Germanōstthe east
3Middle High Germanōst—
4Old High Germanōsteast
5Old Norseaustreast
6Proto-Germanicaustrąeast; east, eastward
7Proto-Germanicaustrazeast, eastern
8Proto-Indo-European*h₂éwsterosin the direction of dawn, east
Every word from Proto-Indo-European *h₂éwsteros →Every word from Proto-Germanic austraz →Every word from Proto-Germanic austrą →
Ostpreußin — Etymology, Origin & Word History | Etymology Explorer