Cognomen สัมฤทธิ (Samrina 
, Samridh 
, Samrith 
) , in the world, is a rare family name. The cognomen สัมฤทธิ is characteristic of Cambodia, where it is a rare surname, Thailand, where it is a very rare surname, and the United States, where it is an extremely rare surname. Measured by absolute frequency, it most frequently occurs in Thailand, India, and the United States. Predominantly, สัมฤทธิ is the forename as well as the last name.