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