Cognomen อวิชัย (Avichai 
, อวิชัย 
) , in the entire world, is a very rare surname. The cognomen อวิชัย is habitual in Thailand, where it is a very rare surname, Israel, and the United States, where it is an extremely rare surname. More frequently, อวิชัย is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Avichai | Israel, France, United States, Morocco, New Zealand |
| อวิชัย | Thailand |