Cognomen Thulasi (Thulasi 
) , in all the world, is quite a common family name. The last name Thulasi is characteristic of Western Asia, particularly Oman, where it is quite a rare surname, United Arab Emirates, and Qatar. Measured by absolute frequency, it is commonest in India, United Arab Emirates, and Saudi Arabia. More frequently, Thulasi is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Thulasi | Sri Lanka, United Arab Emirates, India, Malaysia, Saudi Arabia |
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p. c. thulasi Indian badminton player, IN (b. 1991) |
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| joker thulasi Indian actor, IN (b. 1950) |
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| neethu thulasi researcher |
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| praneetha thulasi researcher |
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Bai, Dasan, Naidu, Varma, Yadav, Mandal, Kannan, Kumari, Paswan, Prasad, Pillai, Dharan, Nathan, Margali, Murugan, Krishna, Perumal, Lakshmi, Chandran, Krishnan, Rangasamy, Subramaniam, Reddy, Krishnakumar, Rajan, Priya, Ram, Raj, Rao, Das, Mani, Amma, Babu, Bhai, Rama, Rani, Raja, Devi, Dass, Nair, Naik, Mohan, Ammal, Bandi, Bhayi, Korra, Kumar, Raman, and Krishnankutty