All around the world, Siago (Siago 
) is an extremely rare male forename. Much more prevalently, Siago is the last name as well as the forename.
Aus, Membo, Sarah, Shawn, Susan, Anida, Arvie, Chona, Carol, Celia, Mario, Paula, Ramon, Randy, Romeo, Robin, Ronel, Renan, Ricky, Rizza, Ruben, Pablo, Maria, Hale, Eric, Ric, Dia, Luz, Lyn, Alex, Aiza, Chad, Cece, Paul, Raul, Romy, Rone, Rene, Ryan, Lani, Jose, John, Joel, Nilo, Elda, Elna, Delia, and Daria