Count Johann VI of Heydeck 
Count Johann VI of's father was Count Johann III of Heydeck and his mother was Baroness Elisabeth of Sickingen. His paternal grandparents were Count Johann II of Heydeck and Princess Agnes of Waldburg. He was an only child.
They had five sons and four daughters, named Count Bonifazius of, Count Friedrich III of, Count Georg of, Count Hans V of, Count Wolfgang of, Princess Anna of, Princess Klara of, Princess Kunigunde of and Princess Rosina of.
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