Surname विश्वनाथ (Vishwanath 
, Viswanath 
, Viswanatha 
) , in the entire world, is a common last name. The family name विश्वनाथ is characteristic of Western Asia, particularly United Arab Emirates, where it is quite a common surname, Oman, where it is quite a rare surname, and Bahrain. In absolute terms, this name is the most popular in India, United Arab Emirates, and Sri Lanka. Much more frequently, विश्वनाथ is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Vishwanath | Sri Lanka, Nepal, United Arab Emirates, India, United States |
| Viswanath | United Arab Emirates, Oman, India, United States, Saudi Arabia |
| Viswanatha | United Arab Emirates, India, Singapore, United States, Saudi Arabia |
| विश्वनाथ | India |
Vishvanaath, Viśvanātha, and বিশ্বনাথ