Great britain travel?

The name Britain is derived from the name Britannia, used by the Romans from circa 55 BC and increasingly used to describe the island which had formerly been known as insula Albionum, the "island of the Albions". The name Britannia derived from the travel writings of the ancient Greek Pytheas around 320 BC, which described the British isles, including Ireland, as the αι Βρεττανιαι, the Brittanic Isles. The peoples of these islands of Prettanike were called the Ρρεττανοι, Priteni or Pretani. These names derived from a "Celtic language" term which is likely to have reached Pytheas from the Gauls, who may have used it as their term for the inhabitants of the islands. Priteni is the source of the Welsh language term Prydain, Britain, which has the same source as the Goidelic term Cruithne used to refer to the early Brythonic speaking inhabitants of Ireland and the north of Scotland. The latter were called Picts or Caledonians by the Romans. (See British Isles (terminology) for further discussion of etymology).