Worldwide, Ślęzak (Ślęzak 
) is an extremely rare unknown gender first name. Predominantly, Ślęzak is the last name as well as the forename.
Jan, Kasia, Kinga, Paweł, Piotr, Radek, Rafał, Daria, Darek, Dawid, Gosia, Laura, Jacek, Jarek, Jakub, Jerzy, Julia, Tomek, Edyta, Filip, Iwona, Wadim, Kamil, Karol, Beata, Basia, Ela, Ewa, Ola, Anna, Ania, Arek, Adam, Asia, Kaja, Kuba, Wiola, Jola, Igor, Wiki, Maria, Marta, Marek, Magda, Mirek, Aneta, Artur, Agata, Irek, and Zosia