Surname Яндян (Яндян 
, Iandian 
) , all over the world, is a very rare cognomen. The last name Яндян is habitual in Georgia, where it is a rare surname, Russia, where it is a very rare surname, and Ukraine, where it is an extremely rare surname. Also, Яндян is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Яндян | Russia, Ukraine, Armenia |
| Iandian | Nigeria, Georgia |