Where does “paintre” come from?

paintre (Old French) comes from Vulgar Latin pinctor, from Latin Pictor, from Latin -tor, from Proto-Italic -tōr, from Proto-Indo-European -tōr, from Proto-Indo-European -tor-s.

Ancestry of “paintre”, step by step

Step	Language	Word	Meaning
1	Vulgar Latin	pinctor	—
2	Latin	Pictor	famously held by
3	Latin	-tor	-er
4	Proto-Italic	-tōr	Forms agent nouns to verb stems
5	Proto-Indo-European	-tōr	Derives agent nouns from verbs, denoting someone...
6	Proto-Indo-European	-tor-s	—

Every word from Proto-Indo-European -tor-s →Every word from Latin -tor →Every word from Latin Pictor →