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Surname Janaka (Janaka , जनक ) , around the world, is quite a common last name. The surname Janaka is characteristic of Sri Lanka, where it is quite a common surname, Qatar, where it is quite a rare surname, and Kuwait. Not in comparison with a country's population, the name is most common in Sri Lanka, Indonesia, and Myanmar. More frequently, Janaka is the forename as well as the last name.
Ma, Priyantha, Ratnayake, Nishantha, Ekanayake, Weerakoon, Samarakoon, Ranasinghe, Rajapaksha, Rathnayake, Rathnayaka, Dahanayake, Gunasekara, Jayasinghe, Wijesinghe, Chathuranga, Dissanayake, Dissanayaka, Edirisinghe, Weerasinghe, Pushpakumara, Priyadarshana, Fernando, Hettiarachchi, Liyanage, Chaminda, Don, Devi, Dias, Majhi, Silva, Alwis, Ruwan, Bhatra, Kumara, Perera, Peiris, Prasad, Gamage, Lakmal, Herath, Manjula, Sampath, Bandara, Bhatara, Pradeep, Sanjeewa, Prasanna, and Wickramasinghe