Around the globe, Šustek (Šustek 
) is an extremely rare unknown gender first name. Much more frequently, Šustek is the last name as well as the forename.
Jan, Michal, Slavko, Andrej, Daniel, Lidija, Josipa, Jiří, Šimon, Stjepan, Róbert, Lukáš, Július, Tomáš, Ondřej, Zdeněk, Željko, Miroslav, Jaroslav, Natalija, Vojtěch, Stanislav, Matouš, Martin, Marija, Marina, Ivo, Adam, Petr, Igor, Mario, Matej, Milan, Mirek, Mirta, Mirko, Vladimír, Karel, Peter, Radim, Roman, David, Jakub, Jozef, Nives, Honza, Fanda, Zoran, Pavel, and František