Cognomen P Karthigai Raju (P Karthigai Raju 
) , worldwide, is an extremely rare last name. The last name P Karthigai Raju is characteristic of South-eastern Asia, particularly Malaysia, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| P Karthigai Raju | Malaysia |
Kalayarasan, and Sivasangari