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In page List of female hereditary monarchs:

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  • Philippa of Harnes, Countess of Harnes, 1230–48
  • Philippa Plantagenet, 5th Countess of Ulster, 13th Lady of Clare & 5th Countess of Ulster, 1363–1381/82[citation needed]
  • Philippa of Lomagne (d. 1286/1294), Viscountess of Lomagne & Auvillar, 1276–1286/1294[citation needed]