Who married Antonio Farnese, Duke of Parma?

Antonio Farnese (29 November 1679 – 20 January 1731) was the eighth and final Farnese Duke of Parma and Piacenza. He married, in 1727, Enrichetta d'Este of Modena with the intention of begetting an heir. The marriage, however, was childless, leading to the succession of Charles of Spain, whose mother, Elisabeth Farnese, was Antonio's niece, to the ducal throne.

Princess Enrichetta d'Este (Enrichetta Maria; 27 May 1702 – 30 January 1777) was a Duchess of Parma by marriage to her cousin Antonio Farnese, Duke of Parma. She was the Regent of Parma in 1731 during her alleged pregnancy in the interregnum after her husband's death.