Family name Jeyakumar (Jeyakumar 
) , globally, is quite a common surname. The last name Jeyakumar is characteristic of Sri Lanka, where it is quite a common surname, Qatar, where it is quite a rare surname, and United Arab Emirates. Measured by absolute frequency, it is the most numerous in Sri Lanka, India, and Malaysia. Likewise, Jeyakumar is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Jeyakumar | United Arab Emirates, Malaysia, Indonesia, India, Sri Lanka |
| k. jeyakumar Indian politician, IN (b. 1950) |
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| arthur jeyakumar (b. 1944) |
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| jeyakumar subbaroyan researcher |
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| harshan sajeev jeyakumar researcher (ORCID 0000-0002-3308-3514) |
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| sajeeka jeyakumar researcher (ORCID 0000-0002-3880-0631) |
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| jeyakumar kandasamy researcher |
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| solai jeyakumar researcher, ORCID id # 0000-0002-7481-0714 |
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| vivek jeyakumar researcher (ORCID 0000-0002-8562-5709) |
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| vimalkumar jeyakumar Ph.D. Stanford University 2014 |
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| nikeshan jeyakumar researcher |
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| anita jeyakumar researcher |
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| angeline jeyakumar researcher (ORCID 0000-0001-7973-0388) |
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| thiviya jeyakumar researcher (ORCID 0000-0002-4647-555X) |
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