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Last name Utthajak (Utthajak ) , all around the world, is a rare cognomen. The cognomen Utthajak is characteristic of South-eastern Asia, particularly Thailand, where it is a rare surname.
| VARIANT | COUNTRY |
|---|---|
| Utthajak | Thailand |
Mayuree, Boonson, Yuttisit, Nutdanai, and Natthanipha