Family name สิ้ว (Sio 
, สิ้ว) , all around the world, is a common surname. The last name สิ้ว is characteristic of 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, it is the most numerous in Macao, Mozambique, and Philippines. Also, สิ้ว is the forename as well as the last name.