Family name ถวิลวรรณ (ถวิลวรรณ 
, Thawinwan ) , around the globe, is a rare surname. The cognomen ถวิลวรรณ is habitual in South-eastern Asia, particularly Thailand, where it is a rare surname. Much less frequently, ถวิลวรรณ is the forename as well as the last name.