Across the world, Riul (Riul 
) is a very rare boy's given name. More frequently, Riul is the last name as well as the forename.
Mr, Enzo, Vera, Irma, Maria, Mario, Mauro, Sueli, Suely, Sonia, Sofia, Alice, Alana, Andre, Amaro, Ahmat, Carla, Carol, Clara, Breno, Bruno, Paulo, Edno, Elza, Nair, Toni, Ms, Ana, Ari, Ria, Mara, Alva, Anna, Caio, Raul, Rosa, Pablo, Rema, Diva, Dora, Lara, Laru, Luis, Luiz, Jair, Jose, Joao, Jean, Rita, and Pedro