Cognomen Тхаи (Thai 
, Tkhai 
, Txai 
) , in all the world, is a common family name. The family name Тхаи is habitual in Malaysia, where it is quite a common surname, Lesotho, and Bhutan (explore the name in all countries). Measured by absolute frequency, the name is most common in Malaysia, Vietnam, and the United States. Likewise, Тхаи is the forename as well as the last name.