text: Jacques I (Jacques François Léonor Goyon de Grimaldi; 21 November 1689 – 23 April 1751) was Prince of Monaco from 1731 to 1733. He was also Duke of Valentinois from 1716 until 1733, and Count of Thorigny. For ten months preceding his accession, he had served as prince consort to his wife, Louise Hippolyte, Princess of Monaco.
  Life and reign
  Jacques came from an ancient Norman family. "Thorigny" is now called Torigni-sur-Vire, where the Mairie is the former family chateau, the Château des Matignon. His uncle was Marshal Charles Auguste de Goÿon de Matignon.
  He was a son of Jacques Goÿon de Matignon, jure uxoris Comte de Thorigny, and Charlotte Goyon de Matignon, Comtesse de Thorigny suo jure.