Cognomen Riczko (Riczko 
) , around the globe, is a rare family name. The cognomen Riczko is characteristic of Hungary, where it is quite a rare surname, Venezuela, where it is a very rare surname, and the United States, where it is an extremely rare surname. Measured by absolute frequency, it is commonest in Hungary, the United States, and Brazil.
Mr, Helia, Sheila, Bonnie, Josefa, Thomas, Evania, Istvan, Egina, Zoltan, Anthony, Charles, Kathryn, Rudinei, Georges, Leonardo, Jonathan, Matthew, Elizabeth, Tiago, Lewis, Ms, Aj, Mary, Anne, Bela, Gina, Lisa, Tirza, Jose, Jean, Inez, Maria, Sarah, Agnes, Celio, Pedro, John, and Veronique