Cognomen ธรรมมัย (Tammamai 
, ธรรมมัย , Thammai 
) , all around the world, is a very rare last name. The last name ธรรมมัย is habitual in Thailand, where it is a very rare surname, and India, where it is an extremely rare surname. Likewise, ธรรมมัย is the forename as well as the last name.