Cognomen Sonnakitkul (Sonnakitkul 
) , across the world, is a very rare last name. The surname Sonnakitkul is habitual in South-eastern Asia, particularly Thailand, where it is a rare surname.
| VARIANT | COUNTRY |
|---|---|
| Sonnakitkul | Thailand |
Kingtian, Napatnopchara, and Tianpansa