Family name Tilak (Tilak 
, Тилак 
, טילאק 
) , across the world, is a common cognomen. The cognomen Tilak is characteristic of Nepal, where it is quite a rare surname, Qatar, and United Arab Emirates. Measured by absolute frequency, it most frequently occurs in India, Nepal, and Saudi Arabia. More prevalently, Tilak is the forename as well as the last name.
| narayan waman tilak Marathi poet from Maharashtra, India, and a famous convert to Christianity (b. 1861) |
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| lakshmibai tilak Marathi Poetess and Writer (b. 1868) |
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tilak jayaratne Sri Lankan academic (1943-2012), LK (b. 1943) |
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| shridhar balwant tilak Indian writer (b. 1896) |
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rajni tilak Indian Dalit rights activist (1958–2018), IN (b. 1958) |
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| tilak goonaratne Sri Lankan diplomat, LK (b. 1919) |
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| k. b. tilak Indian film producer (1926-2010), IN (b. 1926) |
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| raj joshi tilak Indian sprinter, IN (b. 1936) |
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suyash tilak Indian film and television actor (b. 1988) |
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| tilak raj sareen (b. 1935) |
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| tilak raj behad Indian politician, IN (b. 1957) |
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| tilak raj Singer Artist, IN (b. 1960) |
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| tilak agerwala US (b. 1950) |
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| amod tilak badminton player, IN (b. 1962) |
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| sharad s tilak chess player (b. 1962) |
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Sah, Ghosh, Thapa, Verma, Yadav, Mandal, Manjhi, Mahato, Mondal, Sarkar, Sharma, Barman, Biswas, Kalita, Pandit, Paswan, Prasad, Gurung, Thakur, Chandra, Chhetri, Bahadur, Gupta, Dhari, Patel, Kumar, Saw, Sih, Bai, Pal, Ram, Raj, Ray, Rai, Roy, Das, Pradhan, Sahu, Rani, Devi, Deka, Nath, Mahto, Magar, Majhi, Singh, Arora, Chand, Rana, and Adhikari