Last name Vaiu (Vaiu 
) , all around the world, is a rare cognomen. The family name Vaiu is characteristic of Bulgaria, where it is a rare surname, India, where it is an extremely rare surname, and Thailand. Likewise, Vaiu is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Vaiu | Canada, India, Bulgaria, United States, Thailand |