Worldwide, Piekos (Piekos 
) is an extremely rare boy's forename. Very seldom, Piekos is the last name as well as the forename.
Jan, Czeslaw, Barbara, Ryszard, Grazyna, Jadwiga, Jolanta, Tadeusz, Wieslaw, Urszula, Boleslaw, Krystyna, Grzegorz, Elzbieta, Waldemar, Zdzislaw, Zbigniew, Stanislaw, Kazimierz, Krzysztof, Malgorzata, Mieczyslaw, Andrzej, Mariusz, Waclaw, Henryk, Ewa, Anna, Adam, Jzef, Maria, Marek, Piotr, Rafal, Roman, David, Stanislawa, Jerzy, Irena, Wanda, Zofia, Leszek, Janina, Janusz, Joanna, Teresa, Edward, Halina, Jzefa, and Franciszek