Günther VI of Kevernburg - 23 Feb 1289/30 Mar 1289 (b. 1250) Parents Günther V of Kevernburg Matilde Children Mechtild of Käfernburg I Günther IX, Count of Käfernburg Günther VIII of Kevernburg Siblings Günther VII of Kevernburg Partners Sofie von Lüchow