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