Family name Padmanabahan (Padmanabahan 
) , in the world, is an extremely rare last name. The cognomen Padmanabahan is characteristic of Singapore, where it is a very rare surname, the United States, where it is an extremely rare surname, and India.
| VARIANT | COUNTRY |
|---|---|
| Padmanabahan | United States, Singapore, India |
Prakash, and Venkatkumar