Cognomen Prathayya (Prathayya 
) , in the entire world, is a very rare last name. The family name Prathayya is habitual in South-eastern Asia, particularly Singapore, where it is a very rare surname, and Malaysia. Much less frequently, Prathayya is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Prathayya | India, Singapore, Malaysia |