Cognomen เด็น (Den 
, Degn 
, เด็น 
) , throughout the world, is a common last name. The surname เด็น is characteristic of Denmark, where it is quite a common surname, Bhutan, and Brunei. In absolute terms, it most frequently occurs in Indonesia, Pakistan, and India. Likewise, เด็น is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Den | Japan, Ethiopia, Pakistan, Indonesia, India |
| Degn | Ethiopia, China, Denmark, United States, India |
| เด็น | Thailand |