Where does “ostdeutsch” come from?

ostdeutsch (German) comes from German Deutsch, from Old High German diutsch, from Old High German diutisc, from Proto-West Germanic þiudisk, from Proto-Germanic þiudiskaz, from Proto-Germanic þeudō, from Proto-Indo-European tewtéh₂, from Proto-Indo-European tewh₂- — to swell; to crowd; to be strong.

ostdeutsch (German): eastern German; from or pertaining to eastern...

Definitions

  1. eastern German; from or pertaining to eastern...

Ancestry of “ostdeutsch”, step by step

ostdeutsch traces back through two separate lines of ancestry.

via German Deutsch

StepLanguageWordMeaning
1GermanDeutschGerman
2Old High Germandiutsch—
3Old High GermandiutiscAlternative form of diutisk; popular, vernacular;...
4Proto-West Germanicþiudiskof the people, popular, vernacular
5Proto-Germanicþiudiskazof the people, popular; of the tribe
6Proto-Germanicþeudōpeople, tribe
7Proto-Indo-Europeantewtéh₂people, tribe
8Proto-Indo-Europeantewh₂-to swell; to crowd; to be strong

via German ōst

StepLanguageWordMeaning
1Germanōstthe east
2Middle High Germanōst—
3Old High Germanōsteast
4Old Norseaustreast
5Proto-Germanicaustrąeast; east, eastward
6Proto-Germanicaustrazeast, eastern
7Proto-Indo-European*h₂éwsterosin the direction of dawn, east
Every word from Proto-Indo-European tewh₂- →Every word from Proto-Indo-European tewtéh₂ →Every word from Proto-Germanic þeudō →