Cognomen 大帝 (大帝 
, Đại Đế 
) , all around the world, is an extremely rare family name. The last name 大帝 is characteristic of South-eastern Asia, particularly Vietnam, where it is an extremely rare surname. More frequently, 大帝 is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| 大帝 | China |
| Đại Đế | Vietnam |