Cognomen สิงหฤทธิ์ (สิงหฤทธิ์ 
) , in the world, is a very rare family name. The cognomen สิงหฤทธิ์ is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname. Very seldom, สิงหฤทธิ์ is the forename as well as the last name.