Surname Subbaraj (Subbaraj 
) , worldwide, is a rare cognomen. The family name Subbaraj is habitual in United Arab Emirates, where it is a rare surname, Saudi Arabia, and Singapore, where it is a very rare surname. Measured by absolute frequency, it is the most numerous in India, United Arab Emirates, and Saudi Arabia. Also, Subbaraj is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Subbaraj | United Kingdom, Saudi Arabia, United Arab Emirates, United States, India |
| a. s. subbaraj Indian politician (1914-1963), IN (b. 1914) |
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| subbaraj karunakaran researcher (ORCID 0000-0001-5093-490X) |
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| arvind k subbaraj researcher (ORCID 0000-0002-8868-2258) |
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