Family name Ченгйун (Chengjun 
, Chengyun 
, Ченгйун 
) , all around the world, is a rare cognomen. The last name Ченгйун is habitual in Singapore, where it is a rare surname, Georgia, where it is a very rare surname, and Malaysia. In absolute terms, it is commonest in China, Indonesia, and Malaysia. Much more prevalently, Ченгйун is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Chengjun | Indonesia, China, Spain, Taiwan, United States |
| Chengyun | China, Malaysia, Taiwan, United States, Canada |
| Ченгйун | Russia |