Cognomen Kalayanut (Kalayanut 
) , in all the world, is an extremely rare last name. The family name Kalayanut is habitual in South-eastern Asia, particularly Thailand, where it is an extremely rare surname. More frequently, Kalayanut is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Kalayanut | Thailand |