Family name กนิษฐกุล (Kanitkul 
, กนิษฐกุล ) , worldwide, is a very rare cognomen. The surname กนิษฐกุล is habitual in Thailand, where it is a very rare surname, and the United States, where it is an extremely rare surname. Much less frequently, กนิษฐกุล is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Kanitkul | United States, Thailand |
| กนิษฐกุล | Thailand |