Where does “阿亨” come from?

阿亨 (Chinese) comes from German Aachen, from Middle High German Āchen, from Old High German Āhha, from Proto-Germanic *Ākā, from Latin aqua, from Proto-Italic akʷā, from Proto-Indo-European h₂ekʷeh₂ — water, flowing water.

Ancestry of “阿亨”, step by step

StepLanguageWordMeaning
1GermanAachen—
2Middle High GermanĀchen—
3Old High GermanĀhha—
4Proto-Germanic*Ākā—
5Latinaquawater
6Proto-Italicakʷāwater
7Proto-Indo-Europeanh₂ekʷeh₂water, flowing water
Every word from Proto-Indo-European h₂ekʷeh₂ →Every word from Proto-Italic akʷā →Every word from Latin aqua →