All around the world, Pęczek (Pęczek 
) is an extremely rare unknown gender forename. Much more prevalently, Pęczek is the last name as well as the forename.
Jan, Filip, Marcin, Maciej, Monika, Milena, Szymon, Kamila, Kacper, Patryk, Daniel, Joanna, Tomasz, Mariola, Mateusz, Michał, Klaudia, Paulina, Dariusz, Dominik, Natalia, Łukasz, Edyta, Tomek, Julia, Jakub, Ewa, Ola, Maja, Anna, Ania, Adam, Marta, Marek, Anita, Agata, Mikołaj, Beata, Kamil, Kasia, Kinga, Paweł, Piotr, Radek, Rafał, Dawid, Gosia, Jacek, Karol, and Sergiusz