Surname นิรัติศัย (นิรัติศัย 
, Nirattisai 
, Niruttisai ) , all around the world, is a rare family name. The cognomen นิรัติศัย is habitual in Thailand, where it is a rare surname, and the United States, where it is an extremely rare surname. More frequently, นิรัติศัย is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| นิรัติศัย | Thailand |
| Nirattisai, Niruttisai | United States, Thailand |