Where does “māsa” come from?

māsa (Old High German) comes from Proto-Germanic Masō, from Proto-Celtic Mosā.

Ancestry of “māsa”, step by step

StepLanguageWordMeaning
1Proto-GermanicMasōMeuse
2Proto-CelticMosā—

Words derived from “māsa”

Every word from Proto-Celtic Mosā →Every word from Proto-Germanic Masō →
māsa — Etymology, Origin & Word History | Etymology Explorer