Family name สุ่ย (Sui 
, Shui 
, Suyi ) , throughout the world, is a widespread last name. The surname สุ่ย is habitual in Mongolia, where it is a widespread surname, Malaysia, where it is quite a common surname, and Cayman Islands (explore the name in all countries). Not in comparison with a country's population, it is commonest in China, Mongolia, and Malaysia. Much less frequently, สุ่ย is the forename as well as the last name.