All around the world, Koushik (Koushik 
, কৌশিক ) is a widespread boy's first name. The forename Koushik is characteristic of India, where it is quite a rare masculine name, Bangladesh, and United Arab Emirates. Very seldom, Koushik is the last name as well as the forename.
| VARIANT | COUNTRY |
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| Koushik | Bangladesh, United Arab Emirates, United States, India, Saudi Arabia |
| কৌশিক | Bangladesh |
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koushik bhattacharjee vocalist, IN (b. 1975) |
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koushik kar film and theatre actor, director, IN (b. 1984) |
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| koushik saha Ph.D. Indian Statistical Institute, Kolkata 2012 |
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| koushik mondal researcher |
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| koushik guha researcher |
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| koushik ghosh Ph.D. Calcutta University 2004 |
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| koushik saha researcher (ORCID 0000-0002-8371-8952) |
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| koushik chatterjee researcher |
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| koushik dutta researcher, ORCID id # 0000-0002-5976-7965 |
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| koushik mantripragada researcher |
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| koushik ramachandran Ph.D. Purdue University 2014 |
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| koushik bhattacharya researcher |
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| koushik saha researcher ORCID ID = 0000-0002-7609-2947 |
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| koushik debnath researcher |
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| koushik barman researcher (ORCID 0000-0002-7592-3606) |
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De, Mandal, Mondal, Santra, Sardar, Sarkar, Barman, Biswas, Naskar, Halder, Samanta, Debnath, Ganguly, Goswami, Majumdar, Banerjee, Bhowmick, Karmakar, Pramanik, Mukherjee, Chowdhury, Chatterjee, Hazra, Nandi, Ghosh, Dutta, Sen, Bag, Kar, Pal, Ray, Roy, Dey, Das, Maji, Saha, Chakraborty, Bera, Paul, Jana, Manna, Malik, Maity, Mitra, Kundu, Kumar, Patra, Reddy, Bose, and Bhattacharya