Category:Duchesses of Oldenburg

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The title Duchess of Oldenburg and the use of the style "Highness" or "Royal Highness" has generally been restricted to the following persons:

• the spouse of the ruler of the Duchy of Oldenburg (only one ever existed)
• the spouse of the desposed head of the Grand Ducal House of Oldenburg
• the legitimate male-line female descendants of a head of the Grand Ducal House of Oldenburg
• the spouses of legitimate male-line descendants of a head of the Grand Ducal House of Oldenburg