The earliest surviving mention of the Picts dates from AD297. In a poem praising the Roman emperor Constantius Chlorus, the orator Eumenius wrote that the Britons were already accustomed to the semi-naked "Picti and Hiberni (Irish) as their enemies."
Caledonii - Caledonians, Picts and Romans The Romans called the tribes of the north the ‘Caledones’ or ‘Caledonii’ and named their land ‘Caledonia’. The Roman historian Tacitus tells us that the inhabitants of Caledonia had ‘red hair and large limbs’; they were a fierce people that were quick to fight when they first saw the Roman invaders.
The Picts, early inhabitants of Scotland. Pict actually means "painted people". "Pict" was the name of the people who lived in Scotland before the Scots invaded from Ireland, that's right the tribe known as the Scots are Irish. The two lived together and gradually merged until the picts disappeared as a distinct people.