Duchess Altburg of Oldenburg
type: Person
description: (1938-2025)
birth date: 1938-10-14
death date: 2025-10-30
parent: Nikolaus, Hereditary Grand Duke of Oldenburg
parent: Princess Helene of Waldeck and Pyrmont
spouse: Rüdiger Freiherr von Erffa
children: Mattias Hartmann Freiherr von Erffa
children: Rudolf Hartmann Freiherr von Erffa
children: Ferdinand Hartmann Freiherr von Erffa
children: Hurbertus Hartmann Freiherr von Erffa
children: Stephan Hartmann Freiherr von Erffa
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additional property: PropertyValue
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additional property: PropertyValue
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additional property: PropertyValue
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citations:
  source: The Peerage
  stated in qid: Q21401824
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  entity updated at: 2026-05-03T16:20:22.557058+00:00Z
  entity created at: 2026-05-03T13:50:24.911320+00:00Z