Cognomen Kawaei (리나 
, Kawaei 
) , around the globe, is quite a rare last name. The family name Kawaei is habitual in Japan, where it is a rare surname, and Thailand, where it is an extremely rare surname. Also, Kawaei is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| 리나 | South Korea |
| Kawaei | Japan, Thailand |
Ms, Rina, and Shinichiro