Last name ศิลาฤทธิ์ (ศิลาฤทธิ์ 
) , worldwide, is a very rare surname. The surname ศิลาฤทธิ์ is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname. Very seldom, ศิลาฤทธิ์ is the forename as well as the last name.