Where does “不萊梅” come from?

不萊梅 (Chinese) comes from German Bremen, from Old Saxon bremo.

Ancestry of “不萊梅”, step by step

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