Family name 蔡兰 (蔡兰 
) , worldwide, is a very rare last name. The surname 蔡兰 is habitual in Eastern Asia, particularly China, where it is an extremely rare surname. More frequently, 蔡兰 is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| 蔡兰 | China |