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