Throughout the world, Petrek (Petrek 
) is a very rare male first name. Much more prevalently, Petrek is the last name as well as the forename.
Mr, John, Jiri, Ján, Eric, Erik, Vera, Ivan, Zach, Mario, Jane, Marit, Marli, Marek, Mateo, Matej, Matus, Milan, Mindy, Sanja, Sarah, Marko, Luka, Lucy, Gary, Ms, Max, Ana, Amy, Pam, Deb, Dan, Jan, Jay, Jã, Mary, Mato, Miro, Adam, Boro, Brad, Kami, Kurt, Petr, Dale, Dora, Shawn, and Susan