Cognomen Aiyer (Aiyer 
) , around the globe, is quite a rare surname. The family name Aiyer is habitual in Sri Lanka, where it is a rare surname, United Arab Emirates, and South Africa. Not in comparison with a country's population, it is the most numerous in India, South Africa, and the United States. Very seldom, Aiyer is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Aiyer | South Africa, United Arab Emirates, United States, India, Sri Lanka |
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v. ramaswamy aiyer Indian mathematician (b. 1871) |
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| harihar ramaswami aiyer (b. 1921) |
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amritha aiyer Indian film actress, IN (b. 1994) |
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| anuradha k. aiyer Ph.D. Stanford University 2001 |
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| ashok aiyer researcher |
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| amitanand swaminathan aiyer Ph.D. University of Texas at Austin 2010 |
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| sophie m aiyer researcher |
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| kartik s aiyer researcher ORCID ID = 0000-0002-2185-9645 |
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| rohit aiyer researcher |
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