Family name Alappan (Alappan 
) , around the globe, is a very rare surname. The surname Alappan is characteristic of Malaysia, where it is a very rare surname, India, where it is an extremely rare surname, and the United States. More frequently, Alappan is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Alappan | United States, Malaysia, India |