Cognomen Yjj (Yjj 
) , all over the world, is a rare last name. The cognomen Yjj is habitual in Taiwan, where it is a rare surname, New Zealand, where it is a very rare surname, and Thailand, where it is an extremely rare surname. Measured by absolute frequency, this name is the most popular in Taiwan, China, and Thailand. Likewise, Yjj is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Yjj | China, Taiwan, Thailand, India, New Zealand |