Where does “tonnerrois” come from?

tonnerrois (French) comes from French -ois, from Old French -ois, from Latin -ensis, from Latin arvum, from Latin colō, from Latin quelō, from Proto-Italic kʷelō, from Proto-Indo-European kʷéleti — to turn.

Ancestry of “tonnerrois”, step by step

StepLanguageWordMeaning
1French-oisUsed to form adjectives related to a particular...
2Old French-oisused to form nationalities; used to form names of...
3Latin-ensisOf or from
4Latinarvumfield; farm land
5Latincolōto cultivate the land, till, tend, take care of a field or garden
6Latinquelō
7Proto-Italickʷelōto inhabit
8Proto-Indo-Europeankʷéleti
9Proto-Indo-Europeankʷel-to turn
Every word from Proto-Indo-European kʷel-Every word from Proto-Indo-European kʷéletiEvery word from Proto-Italic kʷelō