Surname Roychowdhury (Roychowdhury 
) , around the globe, is a common cognomen. The last name Roychowdhury is characteristic of India, where it is quite a rare surname, United Arab Emirates, where it is a rare surname, and Bangladesh. Measured by absolute frequency, it is commonest in India, Bangladesh, and the United States.
| VARIANT | COUNTRY |
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| Roychowdhury | Bangladesh, United Arab Emirates, United Kingdom, United States, India |
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subroto roychowdhury IN (b. 1943) |
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| deep nath roychowdhury Indian businessperson (born 1961, child of Lt Dhirendra Kishore Roychowdhury), IN (b. 1961) |
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| bijoyinee roychowdhury Indian businessperson (born 1966, child of Shisirangsu Bhusan Bhattacharya), IN (b. 1966) |
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| gargi roychowdhury Indian actress, IN (b. 1975) |
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| raju roychowdhury researcher, ORCID id # 0000-0002-2699-5005 |
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| sohini roychowdhury researcher |
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| aruni roychowdhury Ph.D. University of Massachusetts Amherst 2020 |
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| anasuya roychowdhury researcher ORCID ID=0000-0003-3735-3021 |
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| sambit roychowdhury researcher |
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| dev roychowdhury Researcher in Mental Health and Performance Psychology, AU |
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| abhishek roychowdhury researcher |
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| subhajit roychowdhury researcher |
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| sameek roychowdhury researcher |
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| amit roychowdhury researcher (ORCID 0000-0002-1717-8046) |
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| vwani roychowdhury researcher ORCID ID = 0000-0003-0832-6489 |
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