Globally, Jančo (Jančo 
) is an extremely rare unknown gender first name. Much more prevalently, Jančo is the last name as well as the forename.
Jan, Marcel, Maroš, Matúš, Michal, Miško, Andrej, Dušan, Dárius, Jožko, Martin, Oliver, Števo, Marián, Richard, Dominik, Lukáš, Tomáš, Timotej, Ondřej, Miroslav, Ondrej, Radoslav, Marija, Ivica, Tea, Mira, Samo, Deni, Ján, Ivan, Mario, Marek, Milan, Zoran, Anton, Peter, Roman, Darko, Goran, Jakub, Jozef, Juraj, Filip, Ivana, Pavol, and Alexander