Family name Kirusan (Kirusan 
) , across the world, is an extremely rare cognomen. Much more frequently, Kirusan is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Kirusan | Sri Lanka, Canada, India |
Kiru, Sivapalan, Gunasekaran, Gnaneswaran, Theventhirarajah, and Vasanthakumar