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Last name Kajohnjarukul (Kajohnjarukul ) , throughout the world, is a very rare cognomen. The last name Kajohnjarukul is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Kajohnjarukul | Thailand |
Pakin, Phakin, Phapin, Sinlapa, Lanlalin, Anantachai, and Chatchadaphan