Family name ถกลรัตน์ (ถกลรัตน์ 
, Thakonrat ) , in the entire world, is an extremely rare cognomen. The surname ถกลรัตน์ is characteristic of South-eastern Asia, particularly Thailand, where it is an extremely rare surname. Much more frequently, ถกลรัตน์ is the forename as well as the last name.