Family name เซียร์ (Sia 
, Ciear 
, เซียร์ 
) , around the world, is a common surname. The last name เซียร์ is characteristic of Malaysia, where it is quite a common surname, Brunei, and Cayman Islands (explore the name in all countries). Not in comparison with a country's population, it most frequently occurs in South-eastern Asia, particularly Malaysia, Philippines, and Indonesia. Also, เซียร์ is the forename as well as the last name.