Cognomen ด่าน (Dan 
, ដាន 
, ด่าน) , all around the world, is a widespread family name. The surname ด่าน is characteristic of Romania, where it is a common surname, U.S. Virgin Islands, and Israel (explore the name in all countries). Not in comparison with a country's population, it most frequently occurs in China, India, and Romania. Likewise, ด่าน is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Dan | Romania, United States, India, Nigeria, China |
| ដាន | Cambodia |