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Little is known about Heinrich. His county reverted back to his brother Friedrich's family. As Friedrich only had a daughter, this suggests that Heinrich pre-deceased his brother and had no surviving sons.
|Offspring of Heinrich von Arnsberg and Beatrix von Hildrizhausen|
|Eilika von Werl-Rietberg (c1103-c1150)||1103||1150|| Egilmar II. von Oldenburg (c1070-aft1142)|
Namesakes of Heinrich von Rietberg (c1077-bef1124)