Last name 四家 (Сия 
, 四家 
, Yotsuya 
) , all around the world, is a rare cognomen. The cognomen 四家 is characteristic of Bulgaria, where it is quite a rare surname, Kazakhstan, where it is a very rare surname, and Kyrgyzstan. In absolute terms, it is the most numerous in Bulgaria, the United States, and Brazil. Likewise, 四家 is the forename as well as the last name.