Family name Ianja (Ianja 
) , across the world, is an extremely rare last name. The cognomen Ianja is characteristic of Southern Asia, particularly India, where it is an extremely rare surname. Much more frequently, Ianja is the forename as well as the last name.
Mbola, Randriambalohery, Randrianasolo, Ramananarivo, Rakotomalala, Rakotoniaina, Ramanitrarivo, Ramanantsalama, Rakotozafy, Andriamamy, Andrianaly, Rabearivelo, Ravelojaona, Fandresena, Raolisoa, Ralaimihoatra, Rakotonomenjanahary, and Rakotondramalandraonisera