Cognomen Kayasa (Kayasa 
) , all over the world, is a very rare last name. The family name Kayasa is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname, Indonesia, and Philippines, where it is an extremely rare surname. Measured by absolute frequency, it is commonest in Indonesia, Thailand, and India. Also, Kayasa is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Kayasa | Philippines, Thailand, United States, India, Indonesia |