Cognomen Ionak (Ionak 
) , in the world, is a very rare family name. The surname Ionak is habitual in Latin America and the Caribbean, particularly Brazil, where it is a very rare surname.
Ana, Elvira, Helena, Valdir, Felipe, Isabel, Wagner, Mariano, Marcelo, Antonio, Adriano, Adriane, Adriele, Augusto, Beatriz, Leandro, Luciano, Lucelia, Juliana, Eugenio, Iolanda, Orlando, Josefa, Daniel, Bianca, Ceslau, Rosa, Luan, Joao, Olga, Maria, Celia, Celso, Cesar, Pedro, Raabe, Weslley, Dirce, Luana, Jaime, Jorge, Joana, Julia, Neuza, Fabio, Sergio, Andrea, Camila, Dorli, and Anderson