Last name Yan-Yan (Yan-Yan 
) , all around the world, is a rare family name. The cognomen Yan-Yan is habitual in Taiwan, where it is a rare surname, and Philippines, where it is a very rare surname. Likewise, Yan-Yan is the forename as well as the last name. Parts of the name also exists independently as a last name Yan, and a last name Yan.
| VARIANT | COUNTRY |
|---|---|
| Yan-Yan | Philippines, China, United States, Indonesia, Taiwan |