Surname Gunasilan (Gunasilan 
) , in the entire world, is a rare family name. The surname Gunasilan is habitual in Malaysia, where it is a rare surname, Singapore, and Kazakhstan, where it is a very rare surname. Measured by absolute frequency, it most frequently occurs in Malaysia, India, and Singapore. More prevalently, Gunasilan is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Gunasilan | Kazakhstan, United States, Malaysia, India, Singapore |