Last name Parthasarathi (Parthasarathi 
) , all over the world, is quite a rare surname. The cognomen Parthasarathi is habitual in United Arab Emirates, where it is a rare surname, Oman, and Singapore. Not in comparison with a country's population, it most frequently occurs in India, the United States, and United Arab Emirates. Predominantly, Parthasarathi is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Parthasarathi | United Arab Emirates, United States, Malaysia, Saudi Arabia, India |
| t. v. parthasarathi cricketer (1916-1988), IN (b. 1916) |
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| manavasi narasimhan parthasarathi (b. 1924) |
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| b k parthasarathi Indian politician, IN (b. 1959) |
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| vibodh parthasarathi Indian academic, IN |
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| k. parthasarathi Indian politician, IN |
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De, Nayak, Mandal, Mahato, Mondal, Mishra, Sarkar, Behera, Biswas, Parida, Mohanty, Sarathi, Pradhan, Goswami, Majumdar, Banerjee, Karmakar, Mahapatra, Mukherjee, Chowdhuri, Chatterjee, Chakraborty, Nandi, Ghosh, Gupta, Dutta, Sen, Kar, Pal, Ray, Roy, Dey, Das, Saha, Sahu, Basu, Mukhopadhyay, Bera, Jana, Jena, Mitra, Sahoo, Swain, Barik, Kundu, Patra, Panda, Reddy, Dash, and Bhattacharya