Throughout the world, Dayakar (Dayakar 
) is a common male first name. The first name Dayakar is characteristic of India, where it is quite a rare masculine name, United Arab Emirates, where it is a rare male name, and Saudi Arabia, where it is a very rare masculine name. Not in comparison with a country's population, this name is the most popular in India, United Arab Emirates, and the United States. Very seldom, Dayakar is the last name as well as the forename.
| VARIANT | COUNTRY |
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| Dayakar | Kuwait, United Arab Emirates, United States, India, Saudi Arabia |
| ratakonda dayakar IN (b. 1938) |
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| dayakar indukuri reddy Indian businessperson (born 1977, child of Prabhakar Indukuri Reddy), IN (b. 1977) |
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| rokkam dayakar Indian politician, IN |
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| dayakar v. badri |
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Rao, Jannu, Thota, Naidu, Nalla, Yadav, Mamidi, Mekala, Shetty, Areddy, Challa, Damera, Dasari, Gaddam, Gurram, Moparty, Kummari, Pannala, Puskoor, Duvvuru, Govindu, Nellore, Gattu, Nandyala, Ganta, Pulla, Sama, Sahu, Babu, Rana, Ragi, Daya, Gaud, Gade, Goud, Tata, Erra, Marri, Manda, Mallu, Singh, Chary, Banda, Bandi, Konda, Kotha, Kommu, Reddy, and Battepati