Cognomen Rinkum (Rinkum 
) , all over the world, is a very rare family name. The cognomen Rinkum is characteristic of Thailand, where it is a very rare surname, and India, where it is an extremely rare surname. More frequently, Rinkum is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Rinkum | India, Thailand |