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Cognomen Janak (Janak , Янак , Janák ) , in the world, is a common surname. The cognomen Janak is characteristic of Czechia, where it is quite a common surname, Slovakia, and Nepal, where it is quite a rare surname. In absolute terms, the name is most common in India, Czechia, and Nepal. More frequently, Janak is the forename as well as the last name.
Sah, Mandal, Manjhi, Mahato, Sahani, Sharma, Barman, Behera, Bhagat, Kanwar, Kumari, Pandit, Paswan, Prasad, Dulari, Thakur, Nandni, Mukhiya, Chauhan, Kishori, Pradhan, Nandani, Yadav, Joshi, Patel, Kumar, Sih, Bai, Ram, Raj, Ray, Rai, Roy, Das, Lal, Sahu, Nandini, Sada, Shri, Rani, Devi, Lali, Naik, Mahto, Mehta, Munda, Sahni, Singh, Shah, and Chaudhari