Cognomen Rajnalkar (Rajnalkar 
) , in the world, is a very rare family name. The cognomen Rajnalkar is characteristic of India, where it is an extremely rare surname, and the United States.
| VARIANT | COUNTRY |
|---|---|
| Rajnalkar | United States, India |
Suhas, Vivek, Ashwini, Manjunath, and Shradhanand