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Family name サイス (Saiz , サイス , Sice ) , around the world, is a common last name. The cognomen サイス is characteristic of Liechtenstein, where it is quite a common surname, Spain, and Colombia, where it is quite a rare surname. Measured by absolute frequency, the name is most common in Spain, the United States, and Colombia. Likewise, サイス is the forename as well as the last name.