In the complex mythology of William Blake, Albion is the primeval man whose fall and division results in the Four Zoas: Urizen, Tharmas, Luvah/Orc and Urthona/Los. The name derives from the ancient and mythological name of Britain, Albion.
In the mythical story of the founding of Britain, Albion was a Giant son of Poseidon, the Greek god of the sea. He was a contemporary of Heracles, who killed him. Albion founded a country on the island and ruled there. Britain, then called Albion after its founder, was inhabited by his Giant descendants until about 1100 years before Julius Cæsar's invasion of Britain, when Brutus of Troy came and defeated the small number of Giants that remained (as a group of the Giants had killed all the others).
According to another account, Noah's son Japhet had a son named Histion, who had four sons. Their names were Francus, Romanus, Brittos and Alemannus, and the French, Roman, British and German people are descended from them. Brittos divided Britain into three kingdoms and gave each to one of his sons. They were Loegria (a Latinization of the Welsh Lloegr, "England"), Scotland and Cambria.
The long, unfinished poem properly called Vala, or The Four Zoas expands the significance of the Zoas, but they are integral to all of Blake's prophetic books.
Blake's painting of a naked figure raising his arms, loosely based on Vitruvian Man, is now identified as a portrayal of Albion, following the discovery of a printed version with an inscription identifying the figure. It was formerly known as "Glad Day", since it was assumed by Alexander Gilchrist to illustrate a quotation from Shakespeare.
Blake also uses the name Albion in its traditional meaning, as an ancient synonym for Britain, in his poem "A Little Boy Lost" in Songs of Experience. The poem tells about a young boy who, using reason, realizes that humans are selfish, and that "naught loves another as itself". He asks the priest: "Father, how can I love you / or any of my brothers more? / I love you like the bird that picks up crumbs around the door". The priest accuses the boy of blasphemy, and burns him "in a holy place / where many had been burned before". Blake concludes the poem by asking: "Are such things done on Albion's shore?".
The Sons of Albion feature in the poem Jerusalem. They are 12, and are named as Hand, Hyle, Coban, Guantok, Peachey, Brereton, Slayd, Hutton, Scofield, Kox, Kotope, Bowen. These names are mostly drawn from figures from Blake's 1803 sedition trial.
Albion rose from where he laboured at the Mill with Slaves / Giving himself for the Nations he danc'd the dance of Eternal Death(Full unabbreviated title at: Google Arts & Culture site)