Cognomen Khalilnia (Khalilnia 
) , all around the world, is a very rare family name. The surname Khalilnia is characteristic of Switzerland, where it is a rare surname, Iran, where it is a very rare surname, and Canada, where it is an extremely rare surname. Measured by absolute frequency, it most frequently occurs in Switzerland, Iran, and the United States.
| VARIANT | COUNTRY |
|---|---|
| Khalilnia | Iran, United States, Switzerland, Canada |