Historians of Kumaon and Garhwal say that in the beginning there were only three castes: Rajput, Brahmin and Shilpkar. Main occupation of Rajput were Zamindari and law enforcement. Occupation of Brahmins were to perform religious rituals in temples and religious occasions. Shilpkar were mainly working for rajputs, in their lands and were expert in handcrafts. The famous surnames Kalakoti, Chauhan, Bisht, Bhayera, Nainwal, Rawat, Dhapola, Rautela and Negi are used by Rajputs. Bahuguna, Bhatt, Naithani are some of the famous Brahmin surname, having a university by the name of Bahuguna in Pauri district of Garhwal. According to a 2007 study, Uttarakhand has the highest percentage of brahmins of any community in India, with approximately 20% of the population being brahmin.