In the entire world, Sumudu (Sumudu 
) is quite a common gender-neutral first name. The first name Sumudu is habitual in Sri Lanka, where it is quite a common gender-neutral name, Qatar, where it is quite a rare epicene name, and Kuwait. In absolute terms, it most frequently occurs in Sri Lanka, United Arab Emirates, and Kuwait. Very seldom, Sumudu is the last name as well as the forename.
| VARIANT | COUNTRY |
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| Sumudu | Kuwait, United Arab Emirates, Saudi Arabia, Sri Lanka, Qatar |
| sumudu chandima kumari rubasinghe botanist (b. 1975) |
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| sumudu gangoda researcher |
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| sumudu hewage researcher |
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| sumudu tennakoon researcher |
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| sumudu welikumbura researcher |
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| sumudu r perera researcher ORCID ID = 0000-0003-0165-7189 |
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| sumudu karunaratna researcher (ORCID 0000-0001-6482-4007) |
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| sumudu s karunadasa researcher |
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| sumudu seneviratne researcher (ORCID 0000-0003-2960-9269) |
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| sumudu fernando cricketer, LK (b. 1981) |
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| sumudu atapattu LK |
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| sumudu sameera Sri Lankan cricketer (b. 1995) |
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Dias, Wijekoon, Maduranga, Abeynayake, Priyantha, Nisansala, Madushanka, Samarakoon, Athukorala, Priyankara, Ranasinghe, Rajapaksha, Rathnayake, Jayasinghe, Jayasuriya, Jayasekara, Wijesinghe, Chathuranga, Dissanayake, Weerasinghe, Senevirathne, Hettiarachchi, Fernando, Wickramaratne, Tharanga, Lasantha, Silva, Mendis, Asanka, Attale, Kumara, Kumari, Perera, Peiris, Prasad, Gamage, Lakmal, Herath, Hewage, Malinda, Sampath, Sasanka, Bandara, Kodagoda, Dilshan, Sanjeewa, Athurupana, Liyanage, and Wickramasinghe