Last name Gangaa (Gangaa 
) , in the world, is a rare family name. The family name Gangaa is characteristic of Mongolia, where it is quite a rare surname, Myanmar, where it is a very rare surname, and India, where it is an extremely rare surname. More frequently, Gangaa is the forename as well as the last name.
Bai, Dharan, Mamilla, Bandaru, Bagapooram, Bhavani, Kalluru, Kambati, Pannala, Gajjala, Janjala, Nagella, Nakkala, Batbayar, Kadmisetti, Bilakanti, Ramireddy, Derangula, Tupaakula, Nallagari, Yamavaram, Sanivarapu, Prasad, Gangireddy, Badugu, Mamgai, Ram, Rao, Das, Baai, Kasi, Raam, Devi, Mathi, Singh, Sunku, Setty, Bandi, Boina, Konda, Kumar, Palli, Reddy, Dandu, Gumma, Thati, Mahato, Challa, and Supramaniam