In the entire world, Iuana (Iuana 
) is a very rare largely feminine, but seldom male forename. The given name Iuana is habitual in Argentina, where it is a very rare feminine name, Italy, and Brazil, where it is a very rare unisex name. Very seldom, Iuana is the last name as well as the forename.
Dan, Daiana, Torres, Vieira, Vesfal, Flores, Almeida, Abrahan, Barbosa, Batista, Pereira, Pimenta, Lacerda, Zdraila, Quevedo, Monteros, Munteanu, Simpkins, Carvalho, Cinquini, Prezioso, Oliveira, Paixao, Pauley, Barros, Aquino, Ion, Reus, Dias, Lima, Maria, Silva, Simao, Sousa, Alves, Carmo, Labartino, Crisu, Klein, Rocha, Gomez, Nobre, Funes, Molina, Santos, Alegre, Aguiar, Acosta, Brito, and Engelmann