Cognomen พระวิษณุ (Vishvas 
, Vishva 
, Vishanu ) , all over the world, is a common last name. The last name พระวิษณุ is characteristic of India, where it is quite a rare surname, Sri Lanka, and Qatar, where it is a rare surname. In absolute terms, it most frequently occurs in India, Sri Lanka, and Saudi Arabia. Likewise, พระวิษณุ is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Vishvas | Canada, United States, Malaysia, India, Australia |
| Vishva | United Arab Emirates, Sri Lanka, United States, Saudi Arabia, India |
| Vishanu | United Arab Emirates, United States, Malaysia, Saudi Arabia, India |
| พระวิษณุ | Thailand |
Phra Wissanu, Phrawithun, Prawisnu, and Vishnoi