Cognomen Tyen (Тиен 
, Tyen 
, Тьен ) , all over the world, is a rare family name. The cognomen Tyen is characteristic of Hong Kong, where it is quite a rare surname, Malaysia, where it is a rare surname, and Kyrgyzstan, where it is a very rare surname. Not in comparison with a country's population, the name is most common in Hong Kong, Malaysia, and Indonesia. Likewise, Tyen is the forename as well as the last name.