Family name Viswanadan (Viswanadan 
) , in all the world, is a very rare cognomen. The cognomen Viswanadan is habitual in Malaysia, where it is a very rare surname, and India, where it is an extremely rare surname. More prevalently, Viswanadan is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Viswanadan | South Africa, India, Malaysia |