Nielsen Hayden genealogy
Family: Konrad I of Oldenburg / Ingeborg of Holstein (F13201)
m. Bef 13 May 1339Johann II of Oldenburg (1270-1316) 
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| Gerard IV of Holstein ( -1317)
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Anastasia of Schwerin-Wittenburg ( -1314)
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| Konrad I of Oldenburg ( -1348)
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| Ingeborg of Holstein (1314-1343)
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Christian V of Oldenburg ( -1399)  |