Cognomen Thanappan (Thanappan 
) , in all the world, is a very rare last name. The last name Thanappan is characteristic of Singapore, where it is a rare surname, Malaysia, where it is a very rare surname, and Canada. In absolute terms, it is commonest in India, Malaysia, and Canada. Likewise, Thanappan is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Thanappan | Canada, United States, Malaysia, Singapore, India |