Last name ฤทธิ์ถกล (ฤทธิ์ถกล 
) , in the entire world, is a very rare cognomen. The family name ฤทธิ์ถกล is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname.
| บัณฑิต ฤทธิ์ถกล Thai film director, TH (b. 1951) |
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