Cognomen ต่าย (Tai 
, ต่าย) , across the world, is a widespread last name. The last name ต่าย is habitual in Macao, where it is a common surname, Hong Kong, and Cayman Islands (explore the name in all countries). In absolute terms, the name is most common in China, Myanmar, and Malaysia. Likewise, ต่าย is the forename as well as the last name.