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Last name Itthirat (อิทธิรัฐ , Itthirat ) , throughout the world, is an extremely rare cognomen. Predominantly, Itthirat is the forename as well as the last name.
อิทธิรัตน์
Somsri, Neawla, Bangsai, Khonman, Temwanit, and Yamaphai