nickname
type of anthroponym, an additional name given to a person by people around him, according to his characteristic feature or profession, a circumstance incidental to his life, or by some analogy
White Tsar
unofficial title of the Russian sovereign
Kiwi
nickname for New Zealanders
Big Four of Thrash
nickname referring to the four most popular thrash metal bands that formed in the 1980's, Metallica, Megadeth, Slayer, and Anthrax