Surname Khwanwilai (Khwanwilai 
) , worldwide, is an extremely rare last name. The cognomen Khwanwilai is characteristic of South-eastern Asia, particularly Malaysia, where it is an extremely rare surname, and Thailand. Likewise, Khwanwilai is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Khwanwilai | Thailand, Malaysia |