Marquess of San Felipe (; ), is a hereditary title in the Peerage of Spain and Peerage of Sardinia, granted in 1709 by Philip V to Vicente Bacallar y Sanna, a Sardinian historian of Valencian origin who served as ambassador in the Spanish Netherlands and the Republic of Genoa The title became extinct in 1983 and is currently held in pretence by Vincenzo Amat di San Filippo, an Italian from Alghero. The grant Vicente Bacallar y Sanna (as in the Spanish and Sardinian use, with both the father's and the mother's surnames) was a military officer and politician who supported Philip of Anjou, the heir appointed by the last Habsburg king Charles II, in the War of the Spanish Succession. For this reason, he had to flow in exile when the other claimant, Charles of Austria, took control over Sardinia. As an award to Bacallar's loyalty, Philip, now Philip V of Spain, made him Viscount of Fuente Hermosa and Marquess of St. Philip (as a homage to his own patron saint). Bacallar became later an important historian, linguist and political philosopher while still serving as military and diplomat. The inheritance Bacallar's only surviving issue was his daughter Maria Josefa, who married Francisco Amat of an ancient and distinguished Sardinian house of Catalan origin, son of the Marquess of Villarios. In accordance with Spanish and Sardinian succession rules at that time, she inherited the titles and has transmitted them to her issue. Amat firstborn (the eldest male) has brought the title of Marquess of St. Philip since (the Viscountcy being laid down, although no formal act of disclaimer has ever been issued), and they were recognized as such in Italian official registers until the Italian Republic ceased to recognize nobility titles. Along with the titles, Amats have inherited the name Vicente, or Vincenzo in Italian. List of Marquesses of San FelipeIn order to describe the spouses' houses, main titles of those houses are indicated, in the modern Italian form «of the [title]» Vicente Bacallar, 1st Marquess of San Felipe (b. 1669), 1709-1726; m. Jeronima Cervellon Manca of the Barons of Samatzai; Maria Josefa Bacallar Cervellon, 2nd Marchioness of San Felipe suo jure (b. 1694), daughter of the latter, 1726-1738; m. Francisco Amat Tola of the Marquesses of Villarios; Vicente (Vincenzo) Amat Bacallar, 3rd Marquess of San Felipe (b. 1726), son of the latter, 1738-1762; m. Magdalena Manca Masones Marchioness of Albis