Where does “cheminage” come from?

cheminage (Old French) comes from Old French chemin, from Latin cammīnus, from Gaulish unknown, from Proto-Indo-European (s)pingos — chaffinch.

Ancestry of “cheminage”, step by step

Step	Language	Word	Meaning
1	Old French	chemin	route; way
2	Latin	cammīnus	—
3	Gaulish	unknown	—
4	Proto-Indo-European	(s)pingos	chaffinch

cheminage — Etymology, Origin & Word History | Etymology Explorer