Cognomen Siaz (Siaz 
) , in all the world, is a rare family name. The cognomen Siaz is characteristic of New Zealand, where it is a very rare surname, Mexico, and Spain. In absolute terms, it is the most numerous in the United States, Mexico, and France. Much less frequently, Siaz is the forename as well as the last name.
Joe, Andrea, Romina, Dennis, Janine, Joseph, Nellie, Nelson, Nestor, Eliseo, Eloisa, Eileen, Hector, Vivian, Michael, Andreia, Kaitlyn, Rebecca, Vincent, Frances, Patricia, Raynaldo, Sergio, Santia, Manuel, Martin, Mark, Alba, Cruz, Ruby, Gary, Luiz, Jose, Joan, Juan, Tony, Jonathan, Maria, Shawn, Angel, Angie, Karla, Katia, Danny, Jesus, Trina, Henry, Frank, Sadiq, and Humberto