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