Across the world, Riobo (Riobo 
) is an extremely rare unknown gender first name. Much more frequently, Riobo is the last name as well as the forename.
Mr, Tina, Nina, Elsa, Hebe, Fran, Ines, Ilda, Ivan, Olga, Yago, Maria, Mario, Marta, Marce, Marco, Marly, Mateo, Santi, Sandy, Sarah, Susan, Tefa, Jhan, Juan, Jeny, Ms, Meg, Ana, Paz, Leo, Luz, Ori, Sara, Alex, Alba, Sonia, Adam, Raul, Rosa, Rosi, Rita, Gina, Lara, Lola, Luis, Ludy, Jose, Carl, and Alaan