Where does “Grusien” come from?

Grusien (German) comes from Russian Гру́зия, from Russian грузи́н, from Old East Slavic гурзи — Georgians.

Ancestry of “Grusien”, step by step

StepLanguageWordMeaning
1RussianГру́зия—
2Russianгрузи́нGeorgian, Kartvelian person from the country of Georgia
3Old East SlavicгурзиGeorgians
Every word from Old East Slavic гурзи →Every word from Russian грузи́н →Every word from Russian Гру́зия →