Picts
They are first mentioned in written records in AD 297, before the Roman conquest of Britain. The name 'Pict' is from the Latin pictus meaning 'painted.' This may have been due to reports from the Romans that the Picts tattoos on their bodies, along with reports that ancient Celtic Britons during Roman times would paint themselves various terms that are now translated as "woad", but originally may have meant "glass" and "green" (vitrum and glastum, respectively). This process is described as staining the skin of battle wounds a dark color, since woad is a powerful astringent. It may also refer to a name they called themselves, that was recorded by the Romans.