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.