Page "Duke of Marlborough (title)" Paragraph 8
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The Dukedom of Marlborough is the only dukedom in the United Kingdom that can still pass to a woman and through a woman.
However, the Dukedom does not follow male-preference primogeniture as most other peerages that allow succession by females and cognatic descendants do.
It actually follows a kind of semi-Salic Law.
The succession for the Dukedom is as follows:
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