Family name Чйен (Chien 
, Chjen 
, Chyen 
) , worldwide, is a common cognomen. The cognomen Чйен is characteristic of Cayman Islands, where it is quite a common surname, Malaysia, and Taiwan (explore the name in all countries). Measured by absolute frequency, it is the most numerous in Malaysia, Taiwan, and the United States. Much less frequently, Чйен is the forename as well as the last name.