Surname Viwan (Viwan 
) , around the world, is an extremely rare last name. The family name Viwan is characteristic of Southern Asia, particularly India, where it is an extremely rare surname. Much more prevalently, Viwan is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Viwan | South Africa, India, United States, Thailand |
Hans, Wongviriyawong, Mahawarakorn, Tanrattanawong, Jenmanachaikul, Jarerattanachat, Puangkham, Satjayanukun, Karnasut, Amornkul, Sethapiyanon, Noronha, Khoajunt, Bansal, Imnoi, Gupta, Kumar, Singh, Vittayanukroah, and Mahavarakorn