Cognomen จงมั่นคง (จงมั่นคง, Chongmankhong 
) , across the world, is a very rare family name. The cognomen จงมั่นคง is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Chongmankhong | Thailand |
| จิตต์ จงมั่นคง TH (b. 1922) |
|