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