Family name Nitiwan (Nitiwan 
, นิติวรรณ ) , in all the world, is a very rare cognomen. The last name Nitiwan is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname. More prevalently, Nitiwan is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Nitiwan | Brazil, Thailand |
| นิติวรรณ | Thailand |