Family name Mwanjaa (Mwanjaa 
) , across the world, is an extremely rare cognomen. Much more frequently, Mwanjaa is the forename as well as the last name.
Ali, Bakari, Kabina, Rajabu, Lyezia, Jailos, Ernest, Hamisi, Hassan, Shabani, Shaaban, Seleman, Lupenza, Hussein, Abdallah, Athumani, Kiwangala, Ramadhan, Salimu, Makereketa, Mgelua, Omary, Musa, Seif, Ally, Daud, Juma, Iddi, Iddy, Mussa, Mmero, Salum, Saidi, Abeid, Dunia, Gomba, Ngope, Hango, Omari, Mkumba, and Ramadhani