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