Cognomen 辰弟 (辰弟 
) , all over the world, is a very rare last name. The last name 辰弟 is characteristic of Eastern Asia, particularly China, where it is an extremely rare surname. More prevalently, 辰弟 is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| 辰弟 | China |