Family name Uanin (Uanin 
) , all around the world, is a very rare cognomen. The cognomen Uanin is habitual in Bulgaria, where it is a rare surname, Thailand, where it is a very rare surname, and Argentina, where it is an extremely rare surname. In absolute terms, it most frequently occurs in Bulgaria, Thailand, and Italy. Much less frequently, Uanin is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Uanin | Thailand, Argentina, Bulgaria, Italy, Brazil |