Where does “Westmoustier” come from?
Westmoustier (Middle French) comes from Old French Westmostier, from Middle English Westmynster, from Old English Westmynster, from Old English west, from Proto-West Germanic *westr, from Proto-Germanic westrą, from Proto-Germanic westraz, from Proto-Indo-European wek(ʷ)speros.
Ancestry of “Westmoustier”, step by step