Albion

From Middle English Albion, from Latin Albiōn, an Ancient Gallo-Latin name for Britain (Middle Welsh Albbu, Old Irish Albu), from Proto-Celtic *Albiū, ultimately from Proto-Indo-European *albʰós (“white”), whence also Latin albus (“white”) and Ancient Greek ἀλφός (alphós, “whiteness, white leprosy”). The primary meaning of the Common Celtic word is "upper world" (as opposed to underworld), with semasiological development similar to e.g. Russian свет (svet, “world; light”).

It is often hypothesised that the Romans took it as connected with albus (“white”), in reference to the white cliffs of Dover.