Where does “trentale” come from?

trentale (Latin) comes from Old French trentel, from Latin trigintale, from Latin triginta, from Proto-Indo-European tri(d)ḱomt — thirty; three-ten.

Ancestry of “trentale”, step by step

Step	Language	Word	Meaning
1	Old French	trentel	—
2	Latin	trigintale	—
3	Latin	triginta	thirty; 30
4	Proto-Indo-European	tri(d)ḱomt	thirty; three-ten

trentale — Etymology, Origin & Word History | Etymology Explorer