Surname Isaja (Isaja 
) , in all the world, is a rare family name. The cognomen Isaja is habitual in Italy, where it is a rare surname, Argentina, where it is a very rare surname, and France. Very seldom, Isaja is the forename as well as the last name.
Phil, Davide, Giulia, Javier, Joseph, Natale, Fabien, Michele, Alfredo, Antonio, Amalita, Cettina, Placido, Roberta, Gaetano, Georges, Luciana, Jonatan, Tommaso, Filippo, Maurizio, Antonino, Romina, Pierre, Benito, Corina, Rita, Luca, Luis, Juan, Tony, Erza, Odin, Maria, Marco, Mauro, Antonina, Salvo, Carlo, Pedro, Dario, Giusy, Lucas, Ester, Martin, Melisa, Angela, Ahmeta, Andre, and Cristina