Surname Thanushika (Thanushika 
) , in all the world, is an extremely rare family name. Much more frequently, Thanushika is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Thanushika | Sri Lanka |
Walpita, Pitawala, Rasanjali, Sivanathan, Danthanarayana, Gunatilake, Karunaratne, Surendrapragash, and Rajakulasingam