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- Maria Theresa, Empress of Austria, 1717-17801
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- Marucelli, Benedetto1
- Marucelli, Francesco, 1625-17031
- Mary, Queen of Scots, 1542-15871
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- Maurice, Saint, -approximately 2871
- Maximian, Emperor of Rome, approximately 240-3101
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- Medici, Alessandro de', 1510-15371