Cognomen Tiaga (Tiaga 
) , in the world, is quite a rare surname. The cognomen Tiaga is characteristic of Papua New Guinea, where it is quite a rare surname, Philippines, and Indonesia, where it is a very rare surname. Much less frequently, Tiaga is the forename as well as the last name.
Al, Jane, Jose, Joan, Jevy, Juvy, Niko, Nina, Nida, Nora, Gina, Nezl, Edna, Eric, Erol, Emie, Fely, Mardy, Mitzi, Salud, Shane, Elsa, Gela, Ryan, Rico, Bhe, Roy, Rea, Rio, Don, Ted, Ely, Marc, Mars, Myra, Sisa, Syra, Alit, Alma, Andy, Anjo, Bora, Ravi, Raul, Rosa, Roan, Sofia, and Ariel