Where does “Östtyskland” come from?

Östtyskland (Swedish) comes from Swedish Tyskland, from Swedish tysk, from Old Swedish thysker, 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.

Ancestry of “Östtyskland”, step by step

Östtyskland traces back through two separate lines of ancestry.

via Swedish Tyskland

StepLanguageWordMeaning
1SwedishTysklandGermany
2SwedishtyskGerman; of or pertaining to Germany; German;...
3Old Swedishthysker
4Proto-Germanicþiudiskazof the people, popular; of the tribe
5Proto-Germanicþeudōpeople, tribe
6Proto-Indo-Europeantewtéh₂people, tribe
7Proto-Indo-Europeantewh₂-to swell; to crowd; to be strong

via Swedish öst

StepLanguageWordMeaning
1SwedishöstTowards east, eastward; east
2Old Swedishostercheese
3Old Norseostrcheese
4Proto-Germanicjustazcheese
5Proto-Indo-Europeanyaus-
6Proto-Indo-Europeanyew(ǝ)-to blend, mix , knead
Every word from Proto-Indo-European tewh₂-Every word from Proto-Indo-European tewtéh₂Every word from Proto-Germanic þeudō