Where does “quantiesme” come from?

quantiesme (Middle French) comes from Latin quantus, from Proto-Italic *kʷijentos, from Proto-Indo-European *kʷíh₂onts.

Ancestry of “quantiesme”, step by step

Step	Language	Word	Meaning
1	Latin	quantus	how much, how many; how big
2	Proto-Italic	*kʷijentos	—
3	Proto-Indo-European	*kʷíh₂onts	—

quantiesme — Etymology, Origin & Word History | Etymology Explorer