All over the world, Kaustubh (Kaustubh 
) is a common male forename. The given name Kaustubh is habitual in India, where it is a rare boy's name, United Arab Emirates, and Australia, where it is a very rare male name. In absolute terms, this name is the most popular in India, the United States, and United Arab Emirates.
| VARIANT | COUNTRY |
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| Kaustubh | Japan, United Arab Emirates, United States, Nepal, India |
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kaustubh khade Indian kayaker, IN (b. 1987) |
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| kaustubh narsinh karmarkar Indian businessperson (born 1979, child of Narsinh Shridhar Karmarkar), IN (b. 1979) |
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| kaustubh mulay researcher |
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| kaustubh sinha researcher |
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| kaustubh r. mote researcher |
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| kaustubh hakim researcher (ORCID 0000-0003-4815-2874) |
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| kaustubh s rane researcher |
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| kaustubh priolkar researcher ORCID ID = 0000-0001-8238-552X |
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| kaustubh bora researcher |
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| kaustubh adhikari researcher (ORCID 0000-0001-5825-4191) |
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| kaustubh s. agashe physicist |
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| kaustubh limaye researcher |
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| kaustubh bhave researcher |
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| kaustubh marathe Indian businessman |
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| kaustubh shukla researcher (ORCID 0000-0001-7921-4519) |
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Das, Chavan, Kamble, Pathak, Pandit, Pandey, Phatak, Jagtap, Jadhav, Thakur, Tiwari, Vaidya, Mahajan, Pradhan, Gokhale, Kulkarni, Deshmukh, Tripathi, Chaudhary, Chaudhari, Deshpande, Srivastava, Shukla, Shinde, Sharma, Sawant, Shah, Kale, Rane, Raut, Naik, Singh, Sinha, Kamat, Kadam, Kumar, Chaturvedi, Parab, Patel, Pawar, Desai, Dalvi, Dixit, Gupta, Joshi, Yadav, Mishra, Mhatre, Patil, and Deshpandey