Surname Iaiza (Iaiza 
) , throughout the world, is a rare last name. The family name Iaiza is habitual in Italy, where it is a rare surname, New Zealand, where it is a very rare surname, and Argentina. In absolute terms, it is commonest in Italy, Argentina, and France. Much less frequently, Iaiza is the forename as well as the last name.
Isa, Alessandra, Sebastiano, Valentina, Nicoletta, Federica, Victorio, Cristina, Ernesto, Giorgio, Roberto, Rosanna, Patrick, Alessia, Franco, Alessandro, Joanna, Romano, Adrian, Suzana, Susana, Marcos, Ivano, Laura, Guido, Bruno, Sofia, Irma, Enzo, Luis, Raul, Davide, and Gianpietro