Cognomen อภิไชย (Apichai 
, Aphichai , อภิไชย ) , all over the world, is a rare last name. The last name อภิไชย is habitual in Thailand, where it is quite a rare surname, Cambodia, where it is a very rare surname, and the United States, where it is an extremely rare surname. More frequently, อภิไชย is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Apichai | China, United States, Australia, Thailand, Canada |
| Aphichai | United States, Thailand |
| อภิไชย | Thailand |