Cognomen 乌兰 (Wulan 
, Ulan 
, 乌兰 ) , worldwide, is a common family name. The last name 乌兰 is habitual in Indonesia, where it is quite a common surname, Taiwan, where it is quite a rare surname, and Brunei. In absolute terms, it is commonest in Indonesia, Philippines, and Taiwan. Also, 乌兰 is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Wulan | Philippines, Malaysia, China, Taiwan, Indonesia |
| Ulan | Philippines, Malaysia, China, Saudi Arabia, Indonesia |
| 乌兰 | China |
| Ulaan | Philippines, China, India, United States, Indonesia |