Family name Allappan (Allappan 
) , in the entire world, is a very rare last name. The last name Allappan is habitual in Malaysia, where it is a rare surname, and India, where it is an extremely rare surname. Very seldom, Allappan is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Allappan | Malaysia, India |