Cognomen Kathiresan (Kathiresan 
) , throughout the world, is quite a rare last name. The cognomen Kathiresan is characteristic of Sri Lanka, where it is quite a rare surname, United Arab Emirates, and Malaysia. Not in comparison with a country's population, it is commonest in India, Sri Lanka, and Malaysia. Likewise, Kathiresan is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Kathiresan | United Arab Emirates, United States, India, Sri Lanka, Malaysia |
| suresh kathiresan researcher |
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| sekar kathiresan physician-geneticist and preventive cardiologist |
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| murugavel kathiresan researcher |
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| sekar kathiresan researcher (ORCID 0000-0002-6724-032X) |
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| sekar kathiresan researcher (ORCID 0000-0002-6201-5334) |
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| amaresh kathiresan chess player |
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