In the 2005–2006 season, Štefl competed with Russian skater Olga Prokuronova and won the 2006 Czech senior national title.
Karel Gott | Karel Čapek | Karel Appel | Karel Teige | Karel Reisz | Karel Goeyvaerts | Karel van Mander | Karel Václav Rais | Karel Husa | Karel Roden | Karel Kovařovic | Karel Halík | Jan Karel Lenstra | Karel Zeman | Karel van der Toorn | Karel Svoboda | Karel Štěpánek | Karel Píč | Karel Marquez | Karel Kryl | Karel Kroupa | Karel Jaromír Erben | Karel Zich | Karel Vasak | Karel van Wolferen | Karel Van Mander | Karel Stepanek | Karel Schulz | Karel Plicka | Karel Otčenášek |