Cognomen 在坤 (在坤 
, Zaikun 
) , worldwide, is a rare family name. The family name 在坤 is habitual in China, where it is a very rare surname, and the United States, where it is an extremely rare surname. More frequently, 在坤 is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| 在坤 | China |
| Zaikun | United States, Malaysia, Japan, India, China |