Cognomen Чаи (Chai 
, Chay 
, Tjay 
) , across the world, is a widespread family name. The surname Чаи is habitual in Malaysia, where it is a common surname, British Virgin Islands, and Singapore (explore the name in all countries). Not in comparison with a country's population, it is commonest in China, Malaysia, and Myanmar. Very seldom, Чаи is the forename as well as the last name.