In all the world, Ruidias (Ruidias 
) is an extremely rare boy's first name. Much more frequently, Ruidias is the last name as well as the forename.
Mr, Luis, Luiz, Luan, Jael, Jose, Joao, Joel, Jean, Juan, Jhon, Nery, Elsa, Edio, Emma, Hugo, Vera, Irma, Ilka, Ilto, Omar, Yuri, Lucy, Gina, Gian, Dora, Sol, Aly, Ana, Rui, Luz, Nei, Ivo, Zoe, Mara, Sara, Maria, Saul, Anel, Aura, Cecy, Cruz, Paul, Raul, Rosa, Roxy, Remy, Ruth, Sisy, and Mario