All over the world, Kasthuri (Kasthuri 
) is a common primarily female, but very seldom masculine forename. The first name Kasthuri is characteristic of Sri Lanka, where it is quite a rare unisex name, Singapore, where it is quite a rare girly name, and India, where it is a rare principally female, but very seldom masculine name. Measured by absolute frequency, it most frequently occurs in India, Sri Lanka, and Malaysia. Also, Kasthuri is the last name as well as the forename.
| VARIANT | COUNTRY |
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| Kasthuri | Sri Lanka, Malaysia, United Arab Emirates, Singapore, India |
| kasthuri sreenivasan Textile technologist (b. 1917) |
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| kasthuri raja Indian actor, IN (b. 1946) |
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| velayutham kasthuri Indian businessperson (born 1953, child of Velayutham), IN (b. 1953) |
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| kasthuri kannan researcher |
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| kasthuri srinivasan kannan Ph.D. Texas A&M University 2008 |
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| narayanan kasthuri researcher |
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| narayanan kasthuri |
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