Last name ธัญญวรรณ์ (ธัญญวรรณ์ 
) , worldwide, is a very rare cognomen. The family name ธัญญวรรณ์ is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname. Also, ธัญญวรรณ์ is the forename as well as the last name.