Chilka or Chalka is a gotra of Jats found in Jaipur, Sikar and Jhunjhunu districts of Rajasthan, India. `Chilka` is a Rajasthani language word, which means `Shining`. These people were fair in colour with a typical signing on their faces. So these people were known as Chilka in Rajasthan. ... Found on http://en.wikipedia.org/wiki/Chilka