Where does “不來梅” come from?

不來梅 (Chinese) comes from German Bremen, from Old Saxon bremo.

Ancestry of “不來梅”, step by step

StepLanguageWordMeaning
1GermanBremen—
2Old Saxonbremo—
Every word from Old Saxon bremo →Every word from German Bremen →
不來梅 — Etymology, Origin & Word History | Etymology Explorer