Family name สิ่ว (Sio 
, Chisar 
, Chisin 
) , globally, is a common cognomen. The surname สิ่ว is habitual in Macao, where it is a common surname, Mozambique, where it is quite a rare surname, and Hong Kong. Not in comparison with a country's population, this name is the most popular in Macao, Mozambique, and Philippines. Also, สิ่ว is the forename as well as the last name.