Cognomen Kanwai (Kanwai 
) , all around the world, is a rare last name. The family name Kanwai is habitual in Nigeria, where it is a rare surname, Thailand, where it is a very rare surname, and the United Kingdom, where it is an extremely rare surname. Not in comparison with a country's population, this name is the most popular in Nigeria, Thailand, and the United States. Also, Kanwai is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Kanwai | Thailand, United Kingdom, United States, India, Nigeria |