Worldwide, นิชิอิ (Nishii 
, นิชิอิ 
) is a very rare unisex forename. The forename นิชิอิ is habitual in China, where it is an extremely rare boy's name, and India, where it is an extremely rare female name. More prevalently, นิชิอิ is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Nishii | China, United States, Peru, Taiwan, Japan |
| นิชิอิ | Thailand |