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