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