Globally, Křenek (Křenek 
) is an extremely rare unknown gender first name. Much more frequently, Křenek is the last name as well as the forename.
Jan, Patrik, Robert, Daniel, Jiří, Vladan, Zdenek, Richard, Dominik, Leopold, Lukáš, Jaromir, Tomáš, Václav, Ondřej, Zdeněk, Miroslav, Ladislav, Jaroslav, Stanislav, Michal, Miloš, Matěj, Martin, Mira, Adam, Kuba, Petr, Milan, Aleš, Karel, Kamil, Pavel, Kristián, Radim, Roman, David, Libor, Lukii, Jakub, Josef, Honza, Filip, Ondra, Radek, and Vladimír