Cognomen เอนกฤทธิ์ (เอนกฤทธิ์ 
) , all over the world, is a very rare family name. The cognomen เอนกฤทธิ์ is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname. Much less frequently, เอนกฤทธิ์ is the forename as well as the last name.