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In page List of female hereditary monarchs:

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  • Maria del Pilar Garcia Sancho y Zabala, Duchess of Najera, 1864
  • Maria Eleonora I Boncompagni (1686–1745), also known as Maria Eleoonora I Boncompagni-Ludovisi, Marchioness of Populonia, Countess of Conza, Princess of Piombino, 1707–45[citation needed]
  • Maria Lopez of Haro, Lady of Vizcaya, 1311–25, 1326–33[2]