Nielsen Hayden genealogy
(Unknown) von Oldenburg
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| Richza -Bef 1270 |
| Richza | |
| D: | Bef 1270 |
Johann I of Oldenburg Abt 1204-Abt 1270 |
| Johann I of Oldenburg | |
| B: | Abt 1204 |
| D: | Abt 1270 |
| Heinrich II von Hoya -1290 |
| Heinrich II von Hoya | |
| D: | 25 Jan 1290 |
| Hedwig -Bef 1244 |
| Hedwig | |
| D: | Bef 1244 |
| Heinrich I von Hoya -1235 |
| Heinrich I von Hoya | |
| D: | 25 Nov 1235 |
| Richza von Wölpe -Bef 1227 |
| Richza von Wölpe | |
| D: | Bef 1227 |
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