Family name Al Mamun (Al Mamun 
) , globally, is a common cognomen. The cognomen Al Mamun is characteristic of Bangladesh, where it is quite a common surname, Oman, where it is quite a rare surname, and Qatar. Not in comparison with a country's population, it is commonest in Bangladesh, Saudi Arabia, and Oman. Much less frequently, Al Mamun is the forename as well as the last name.
Al, Sohel, Anwar, Abdul, Ahmed, Kabir, Rajib, Rasel, Ripon, Rubel, Selim, Giash, Tuhin, Nasir, Nakib, Nahid, Noyon, Hasan, Farid, Faruk, Fahad, Jakir, Fahim, Sujon, Sayem, Ab, Hm, M A, Abu, Moon, Saif, Arif, Asif, Azad, Sumon, Khan, Engr, Faiz, Masud, Mamun, Salim, Samim, Sahid, Sakir, Sayed, Pial, and Feroz