Family name Ваидянатхан (Ваидянатхан 
) , in the world, is an extremely rare cognomen. The cognomen Ваидянатхан is characteristic of Eastern Europe, particularly Russia, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| Ваидянатхан | Russia |
Vaidianathan, and Vaidyanathan