Albion (Ancient Greek: Ἀλβιών) is the oldest known name of the island of Great Britain. Today, it is still sometimes used poetically to refer to the island. The name for Scotland in the Celtic languages is related to Albion: Alba in Scottish Gaelic, Alba (genitive Alban, dative Albain) in Irish, Nalbin in Manx and Alban in Welsh, Cornish and Breton. These names were later Latinised as Albania and Anglicised as Albany, which were once alternative names for Scotland.
New Albion and Albionoria ("Albion of the North") were briefly suggested as names of Canada during the period of the Canadian Confederation. Captain Arthur Phillip, first leader of the colonization of Australia, originally named the Sydney Cove "New Albion", but for uncertain reasons the colony acquired the name "Sydney".
The Brittonic name for the island, Hellenised as Albíōn (Ἀλβίων) and Latinised as Albiōn (genitive Albionis), derives from the Proto-Celtic nasal stem *Albi̯iū (oblique *Albiion-) and survived in Old Irish as Albu (genitive Albann). The name originally referred to Britain as a whole, but was later restricted to Caledonia (giving the modern Scottish Gaelic name for Scotland, Alba). The root *albiio- is also found in Gaulish and Galatian albio- ("world") and Welsh elfydd (elbid, "earth, world, land, country, district"). It may be related to other European and Mediterranean toponyms such as Alpes and Albania. It has two possible etymologies: either *albho-, a Proto-Indo-European root meaning "white" (perhaps in reference to the white southern shores of the island, though Celtic linguist Xavier Delamarre argued that it originally meant "the world above, the visible world", in opposition to "the world below", i.e., the underworld), or *alb-, Proto-Indo-European for "hill".