Across the world, ฤทธิ์ธา (ฤทธิ์ธา 
) is a very rare principally masculine, but very infrequently female first name. The first name ฤทธิ์ธา is habitual in South-eastern Asia, particularly Thailand, where it is a very rare predominantly masculine, but scarcely girly name. Also, ฤทธิ์ธา is the last name as well as the forename.