Family name Upadhyaya (Upadhyaya 
, उपाध्याय , Упадхьяя 
) , in all the world, is a common surname. The last name Upadhyaya is characteristic of Nepal, where it is quite a common surname, India, where it is quite a rare surname, and Brunei. In absolute terms, it is commonest in India, Nepal, and the United States.
| chabilal upadhyaya Indian politician and freedom fighter (b. 1882) |
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meena upadhyaya Indian-born Welsh medical geneticist |
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| kashi nath upadhyaya (b. 1930) |
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| suresh ambalal upadhyaya (b. 1932) |
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| keshav prasad upadhyaya former Chief Justice of Nepal (b. 1944) |
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| g. s. upadhyaya (b. 1939) |
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| mukunda sharan upadhyaya (b. 1940) |
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| yogendra upadhyaya Indian politician, IN (b. 1955) |
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| vibha upadhyaya (b. 1957) |
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| mohan upadhyaya Sanskrit Scholar, IN (b. 1968) |
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| ramesh kumar upadhyaya (b. 1961) |
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| vijay upadhyaya AT (b. 1966) |
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| kamal prasad upadhyaya Ph.D. Auburn University 1993 |
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| indu upadhyaya researcher |
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| bishal upadhyaya researcher (ORCID 0000-0001-6992-1914) |
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