Cognomen Tharangkoon (Tharangkoon 
) , around the world, is a rare last name. The cognomen Tharangkoon is habitual in South-eastern Asia, particularly Thailand, where it is a rare surname. Much less frequently, Tharangkoon is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Tharangkoon | United States, Thailand |