Where does “Artois” come from?

Artois (French) comes from Old French Arteis, from Latin Atrebates, from Proto-Celtic ad-treb-a-t-es, from Proto-Celtic treb — home, building.

Ancestry of “Artois”, step by step

Step	Language	Word	Meaning
1	Old French	Arteis	—
2	Latin	Atrebates	—
3	Proto-Celtic	ad-treb-a-t-es	inhabitants
4	Proto-Celtic	treb	home, building

Artois — Etymology, Origin & Word History | Etymology Explorer