Family name Ronu (Ronu 
) , worldwide, is a rare surname. The cognomen Ronu is habitual in Oman, where it is a rare surname, Bangladesh, and Israel, where it is a very rare surname. Measured by absolute frequency, the name is most common in Bangladesh, India, and Oman. More prevalently, Ronu is the forename as well as the last name.
Mal, Gupta, Ghosh, Hazra, Yadav, Mandal, Maiiti, Mondal, Sarkar, Sharma, Singha, Kumari, Partra, Haldar, Samanta, Acharya, Bishwas, Pardhan, Nilmoni, Majumdar, Banerjee, Mukherjee, Datta, Chowdhury, Patel, Konai, Sen, Bar, Kar, Pal, Ray, Roy, Dey, Das, Miah, Saha, Shaw, Bera, Khan, Devi, Giri, Jana, Nath, Manna, Sahoo, Singh, Bagdi, Kumar, and Chakraborty