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