Last name Ratwatte (Ratwatte 
) , around the world, is quite a common cognomen. The last name Ratwatte is habitual in Sri Lanka, where it is quite a common surname, Australia, where it is a very rare surname, and the United Kingdom. Not in comparison with a country's population, this name is the most popular in Sri Lanka, Australia, and the United States.
| VARIANT | COUNTRY |
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| Ratwatte | Australia, Canada, United States, Sri Lanka, United Kingdom |
| a. c. l. ratwatte Ceylonese politician (b. 1909) |
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| clifford ratwatte Sri Lankan politician, LK (b. 1927) |
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| mallika ratwatte (b. 1932) |
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| mahendra ratwatte politician |
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| wilfred a. ratwatte Sri Lankan politician, LK |
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| ratwatte nilame |
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| s.d. ratwatte |
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| nigel ratwatte Sri Lankan rugby union player, LK (b. 1990) |
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| tharinda ratwatte Sri Lankan rugby sevens player (b. 1995) |
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Mr, Malinga, Mithula, Shahima, Shamika, Shalini, Anishka, Buddika, Kamilka, Kolitha, Rajitha, Tehanee, Nandika, Nilmini, Manonita, Suranjan, Chamilka, Kavindha, Ranishka, Lihini Warnika, Tahindri, Nilanthi, Nalaka, Nadine, Naresh, Tahire, Ms, Anil, Mevan, Anuja, Chula, Krish, Pahan, Rahul, Lekha, Naren, Prashanti, Nihal, Marlon, Sheran, Suresh, Sumeda, Charya, Chenks, Pathum, Ramesh, Lihini, Janaka, Hiran, and Priyanthi