Family name Illankovan (Illankovan 
) , all around the world, is a very rare surname. The cognomen Illankovan is habitual in Australia, where it is a very rare surname, and the United Kingdom, where it is an extremely rare surname. Very seldom, Illankovan is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Illankovan | Australia, United Kingdom, United States |