In all the world, Ringku (Ringku 
) is quite a common unisex given name. The forename Ringku is characteristic of Bangladesh, where it is a rare epicene name, Oman, where it is a rare masculine name, and India, where it is a rare mostly feminine, but seldom masculine name. Very seldom, Ringku is the last name as well as the forename.
De, Nandi, Mandal, Sarkar, Sharma, Shudra, Chakma, Barman, Biswas, Malakar, Bhowmik, Debnath, Majumder, Aacharyy, Karmakar, Rudrapal, Debbarma, Shukladas, Sutradhar, Chaudhuri, Sarkar Das, Shuklabaidy, Ghosh, Chakraborty, Gogoi, Rabha, Sen, Ali, Pal, Ray, Roy, Deb, Das, Gop, Saha, Shil, Bady, Khan, Debi, Deka, Dhar, Nath, Nama, Marak, Singh, Banik, Begam, Datta, and Bhattacharjee