Mechtild of Käfernburg I German countess (d. 1331) Parents Sofie von Lüchow Günther VI of Kevernburg Children Irmgard of Schwarzburg Günther X, Count of Schwarzburg-Wachsenburg Henry VIII, Count of Schwarzburg-Leutenberg Siblings Günther IX, Count of Käfernburg Günther VIII of Kevernburg Partners Günther VI, Count of Schwarzburg