Surname 臣 (臣 
, Sîn 
, 신 
, along with others...) , all over the world, is a widespread cognomen. The surname 臣 is characteristic of South Korea, where it is a common surname, Guatemala, where it is quite a rare surname, and China. Very seldom, 臣 is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| 臣 | China |
| Sîn | Tunisia, Morocco, Algeria |
| 신 | South Korea |
| Sàn | Tunisia, Morocco, Vietnam, Algeria, Myanmar |
| Thần | Vietnam |
| Chén | China, Vietnam, Guatemala, Taiwan, Myanmar |