Cognomen Тхен (Then 
, Txen 
, Тхен 
) , all around the world, is a common last name. The family name Тхен is habitual in the Dominican Republic, where it is quite a common surname, Malaysia, and Brunei, where it is quite a rare surname. In absolute terms, the name is most common in Indonesia, Malaysia, and the Dominican Republic. Also, Тхен is the forename as well as the last name.