Irmgard was the daughter of Gerhard VI von Oldenburg-Delmenhorst and Adelheid van Tecklenburg-Schwerin. The date and place of her birth have not been found.
Her husband was Hero Ommeken zu Esens. They were married, but the date and place have not been found. They had no known children.
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Gerhard VI von Oldenburg-Delmenhorst |
Dietrich von Oldenburg |
Christian V von Oldenburg-Weisburg |
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Agnes von Honstein |
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Heilwig von Schleswig-Holstein |
Gerhard VI von Holstein-Rendsburg |
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Elisabeth von Braunschweig-Lüneburg |
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Adelheid van Tecklenburg-Schwerin |
Otto VII van Tecklenburg-Schwerin |
Nicolaas II van Tecklenburg-Schwerin |
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Elisabeth von Mörs-Saarwerden |
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Ermengard von Hoya-Bruchhausen |
Erich I von Hoya-Bruchhausen |
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Helena von Braunschweig-Lüneburg |
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