Surname ใจยา (Chaiya 
, Jaiya 
, ใจยา ) , around the globe, is quite a common last name. The last name ใจยา is habitual in Thailand, where it is quite a rare surname, Sweden, where it is a rare surname, and Singapore. In absolute terms, the name is most common in Thailand, India, and Indonesia. Also, ใจยา is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Chaiya | Sweden, United States, Malaysia, Thailand, India |
| Jaiya | United States, Myanmar, Thailand, India, Indonesia |
| ใจยา | Thailand |