Who or what is Saint Pol? Wikipedia advises it was a county (area ruled by a Count). The last Count or Countess was Marie de Nemours who sold Saint Pol to Louis, Duc de Joyeuse who died childless so it passed on to Charles de Rohan who married three times - "Firstly in 1734 to Anne Marie Louise de La Tour d'Auvergne 1722 - 1739, daughter of Emmanuel Théodose de La Tour d'Auvergne and a grand daughter of the famous Marie Anne Mancini; Anne Marie Louise died in 1739 giving birth to a son who died in 1742. Their daughter was; Charlotte Élisabeth Godefride de Rohan 1737 - 1760 known as Charlotte. She married Louis Joseph de Bourbon, a Prince du Sang and descendant of Louis XIV of France and Madame de Montespan. Charlotte was the paternal grand mother of the murdered duc d'Enghien. In 1741 he married again this time to a Savoyard Princess named Anna Teresa 1717 - 1745, a daughter of the Prince of Carignan and Maria Vittoria Francesca of Savoy who in turn was an illegitimate daughter of Victor Amadeus II of Sardinia. Anna Teresa (known as Anne Thérèse de Savoie) gave birth to another daughter Victoire Armande Josèphe de Rohan 1743 - 1807. She married Henri Louis Marie de Rohan, Prince of Guéménée who was a cousin. Victoire was later the governess to the daughter of Marie Antoinette. Anne Thérèse died in 1745. The same year Charles married again to a German Princess, Landgravine Anne Victoire of Hesse-Rotenburg 1728 - 1792. Anna Viktoria was a niece of an old Princess of Condé, Landgravine Caroline of Hesse-Rotenburg. Anna Viktoria had no children."
I believe this is Anna Viktoria.