Where does “Ostarrîchi” come from?

Ostarrîchi (Old High German) comes from Old High German rīhhi, from Proto-West Germanic rīkī, from Proto-Germanic rīkijaz, from Proto-Germanic rīks, from Proto-Celtic rīxs, from Proto-Indo-European h₃rḗǵs, from Proto-Indo-European h₃reǵ- — to straighten, to right oneself; right; just.

Ancestry of “Ostarrîchi”, step by step

Ostarrîchi traces back through two separate lines of ancestry.

via Old High German rīhhi

StepLanguageWordMeaning
1Old High Germanrīhhirich, mighty; power, might, empire; realm
2Proto-West Germanicrīkīmighty, powerful; rich; kingdom, realm
3Proto-Germanicrīkijazkingly, royal, noble; mighty, powerful; rich
4Proto-Germanicrīksking, ruler
5Proto-Celticrīxsking
6Proto-Indo-Europeanh₃rḗǵsking, ruler
7Proto-Indo-Europeanh₃reǵ-to straighten, to right oneself; right; just

via Proto-Germanic austraz

StepLanguageWordMeaning
1Proto-Germanicaustrazeast, eastern
2Proto-Indo-European*h₂éwsterosin the direction of dawn, east

Words derived from “Ostarrîchi

Every word from Proto-Indo-European h₃reǵ-Every word from Proto-Indo-European h₃rḗǵsEvery word from Proto-Celtic rīxs