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Family name Yutthajak (Yutthajak ) , around the globe, is an extremely rare cognomen. Much more frequently, Yutthajak is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Yutthajak | Thailand |
Nojit, Pimkhot, Khiawaiy, Chuangphonngam, Thongyost, Wongthong, Saengpakdee, and Wongjongjaiharn