Nielsen Hayden genealogy
Family: Welf I of Bavaria / Judith of Flanders (F684)
m. 1071Albert Azzo II (997-1097) 
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Kunigunde of Altdorf (1020-1055)
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| Baldwin IV "The Bearded" (980-1035)
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| Welf I of Bavaria ( -1101)
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| Judith of Flanders (1033-1094)
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Henry IX of Bavaria (1074-1126)  |