Last name Devarajan (Devarajan 
, เทวราช 
) , worldwide, is quite a common surname. The last name Devarajan is habitual in United Arab Emirates, where it is quite a rare surname, Oman, and Malaysia. Not in comparison with a country's population, it most frequently occurs in India, Malaysia, and United Arab Emirates. Also, Devarajan is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Devarajan | United Arab Emirates, United States, Malaysia, Sri Lanka, India |
| เทวราช | Thailand |
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g. devarajan Indian music composer, IN (b. 1924) |
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sharad devarajan Indian-American comic publisher, US (b. 1975) |
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devarajan varadarajan Singaporean actor, singer and director, SG (b. 1980) |
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| hari devarajan Indian cricketer, IN (b. 1934) |
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| peranamallur narayanaswamy devarajan Indian businessperson (born 1935, child of Narayanaswamy Subramanian), IN (b. 1935) |
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| devarajan sambandam Indian businessperson (born 1949, child of Sambandam Sengodan Palaniandi), IN (b. 1949) |
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| devarajan chinnusamy Indian businessperson (born 1961, child of Chinnusamy), IN (b. 1961) |
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| shantayanan devarajan (b. 1954) |
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| sudharsan devarajan Indian businessperson (born 1975, child of Devarajan Sambandam), IN (b. 1975) |
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| keerthana devarajan researcher |
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| naresh devarajan researcher |
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| m. devarajan politician, IN |
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| raji devarajan researcher (ORCID 0000-0001-6054-8383) |
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| devarajan natarajan researcher |
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| deepa devarajan researcher (ORCID 0000-0002-2138-423X) |
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