Rika \r(i)-ka\ as a girl's name is a variant of Rickie. See for origin and meaning of Rika.
The baby name Rika sounds like Rica, Riki, Rieka and Ricka. Other similar baby names are Rina, Mika, Rita, Nika, Rivka, Riva, Ria, Rima, Risa, Rida, Rifka and Vika.