Family name Yu-San (Yu-San 
) , across the world, is quite a rare last name. The cognomen Yu-San is characteristic of Japan, where it is a rare surname, and India, where it is an extremely rare surname. Likewise, Yu-San is the forename as well as the last name. Parts of the name also exists independently as a last name Yu, and a last name San.
| VARIANT | COUNTRY |
|---|---|
| Yu-San | Japan, South Africa, Taiwan, United States, India |