Altuan is an ancient island-continent. It includes the cities of Amas-Nath, Xammad and Ibtand. A place inhabited by the Serpent People. It might appear in the Sussex Manuscript under the corruption "Altorn" (the singular form of "Altornos"). It may be a kingdom or district of the Mesozoic continent of Shuggon or even an alternative name for the same place. It might also be the same as Altuas.
Altaun was created by James Ambuehl.