What is the latin name for cooper?

Answer 1

The classical Latin term for a wooden vat is cupa and the word for a maker of vats would be cuparius - which is to be seen on this inscription relating to a Roman cooper and porter:

d. m. | Eugeniae | filiae defun|ctae Iulius Vic|tor cuparius | et saccarius, et |

Acceptinae con|iugi et Florentino | filio vivis vivus | fecit

In medieval or Low Latin, the term cupariis was used for maker of buckets, vats and barrels, in other words a cooper.