The name of which ancient race is derived from the Latin for 'painted or tattooed people'?

The Picts were a tribal confederation of peoples who lived in what is today eastern and northern Scotland during the Late Iron Age and Early Medieval periods. They are thought to have been ethnolinguistically Celtic. Picts are attested to in written records from before the Roman conquest of Britain to the 10th century, when they are thought to have merged with the Gaels. They lived to the north of the rivers Forth and Clyde, and spoke the now-extinct Pictish language, which is thought to have been closely related to the Celtic Brittonic language spoken by the Britons who lived to the south of them.

What the Picts called themselves is unknown. The Latin word Picti first occurs in a panegyric written by Eumenius in AD 297 and is taken to mean "painted or tattooed people" (from Latin pingere "to paint"; pictus, "painted", cf. Greek "πυκτίς" pyktis, "picture"). As Sally M. Foster noted, "Much ink has been spilt over what the ancient writers meant by Picts, but it seems to be a generic term for people living north of the Forth–Clyde isthmus who raided the Roman Empire."