1530s, "one skilled in any mechanical art, craftsman," from Italian artigiano, from Vulgar Latin *artitianus, from Latin artitus "skilled," past participle of artire "to instruct in the arts," from ars (genitive artis) "art" (see art (n.)). Barnhart reports French artisan, often given as the direct source of the English word, is attested too late to be so.
"one skilled in geometry," late 15c., from Latin geometres (in Late Latin also geometra), from Greek geometres "land-measurer" (see geometry).
"person skilled in logic," late 14c., from Old French logicien (13c.), from logique (see logic). The Greek word was logistes.