Cognomen ซิ่น (Sin 
, ซิ่น) , across the world, is a widespread surname. The surname ซิ่น is characteristic of Macao, where it is a common surname, Malaysia, and Myanmar (explore the name in all countries). In absolute terms, it most frequently occurs in Myanmar, Malaysia, and India. Very seldom, ซิ่น is the forename as well as the last name.