Cognomen ธรรมนิทรา (Tamnitra 
, ธรรมนิทรา 
) , throughout the world, is a very rare family name. The cognomen ธรรมนิทรา is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname. Much less frequently, ธรรมนิทรา is the forename as well as the last name.