Last name จันทร์พงศ์ (Monday 
, Janpong 
, Chanpong 
) , throughout the world, is a widespread cognomen. The cognomen จันทร์พงศ์ is habitual in Nigeria, where it is a common surname, Gabon, where it is quite a rare surname, and Iceland. Not in comparison with a country's population, this name is the most popular in Nigeria, the United States, and Philippines. Likewise, จันทร์พงศ์ is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Monday | Uganda, Philippines, United States, Nigeria, Thailand |
| Janpong | Thailand, India |
| Chanpong | Canada, Philippines, United States, Thailand, India |
| จันทร์พงศ์ | Thailand |