Where does “Ostdeutscher” come from?

Ostdeutscher (German) comes from German Deutscher, from German deutsch, from Old High German tiusch, from Old High German diutisc, from Proto-West Germanic þiudisk, from Proto-Germanic þiudiskaz, from Proto-Germanic þeudō, from Proto-Indo-European tewtéh₂ — to swell; to crowd; to be strong.

Ostdeutscher (German): East German male or of unspecified gender

Definitions

  1. East German male or of unspecified gender

Ancestry of “Ostdeutscher”, step by step

Ostdeutscher traces back through two separate lines of ancestry.

via German Deutscher

StepLanguageWordMeaning
1GermanDeutscherGerman; inflection of Deutsche: ## strong...
2GermandeutschGerman
3Old High Germantiusch
4Old High GermandiutiscAlternative form of diutisk; popular, vernacular;...
5Proto-West Germanicþiudiskof the people, popular, vernacular
6Proto-Germanicþiudiskazof the people, popular; of the tribe
7Proto-Germanicþeudōpeople, tribe
8Proto-Indo-Europeantewtéh₂people, tribe
9Proto-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 tewtéh₂Every word from Proto-Germanic þeudō