Cognomen Perumalsamy (Perumalsamy 
) , all over the world, is quite a rare family name. The surname Perumalsamy is characteristic of Western Asia, particularly United Arab Emirates, where it is a rare surname, Oman, and Bahrain. In absolute terms, this name is the most popular in India, Malaysia, and United Arab Emirates. Very seldom, Perumalsamy is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Perumalsamy | Malaysia, United States, South Africa, India, United Arab Emirates |
| perumalsamy n. balaguru (b. 1947) |
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| perumalsamy priyadharsini botanist |
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| haribalan perumalsamy researcher (ORCID 0000-0002-6497-5857) |
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| lakshmi r perumalsamy researcher |
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