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Globally, ธรรมยาฤทธิ์ (ธรรมยาฤทธิ์ ) is an extremely rare unknown gender given name. Much more prevalently, ธรรมยาฤทธิ์ is the last name as well as the forename.
Thummayarit
สุรชัย, and ฤทัยรัตน์