Cognomen Janchayjangsiri (Janchayjangsiri 
) , worldwide, is a very rare family name. The last name Janchayjangsiri is characteristic of South-eastern Asia, particularly Thailand, where it is a rare surname.
| VARIANT | COUNTRY |
|---|---|
| Janchayjangsiri | Thailand |
Adtapinya, Bhuthana, Piyachai, Bhuribhat, and Natchabhat