Heinrich IX (Welf) Duke of BAVARIA & Ulfide (Wolfhildis) Princess of SAXONY 
They had a son named Heinrich 'The Proud' Duke of Bavaria and Saxony.
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Personal Details
Heinrich IX (Welf) Duke of BAVARIA
Heinrich IX (Welf) Duke of was born in 1074 in Bavaria. He died at the age of 52 on December 13th, 1126 in Ravensburg Donau, Wuerttemburg, Germany.
Ulfide (Wolfhildis) Princess of SAXONY
Ulfide (Wolfhildis) Princess of was born about 1079 in Saxe, Prussia. She died on December 29th, 1126 in Altdorf, Uri, Switzerland.
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Children
Heinrich 'The Proud' Duke of Bavaria and Saxony UNKNOWN
Heinrich 'The Proud' Duke of Bavaria and Saxony was born about 1110 in Bavaria. He died on October 20th, 1139.