Family name Oiara (Oiara 
) , all over the world, is an extremely rare cognomen. Much more prevalently, Oiara is the forename as well as the last name.
Cruz, Mattais, Machado, Magdanz, Atencio, Barboza, Bonilla, Martins, Paranhos, Hoffmann, Ferreira, Oliveira, Americano, Prudencio, Goncalves, Hannibal, Nascimento, Franca, Krause, Kuse, Rosa, Leon, Leal, Lehn, Temp, Prates, Silva, Souza, Alves, Abadi, Braga, Kruel, Chagas, Sousa, and Bittencourt