Alfonso IV d'Este, Duke of Modena

Alfonso IV d'Este, Duke of Modena (2 February 1634 – 16 July 1662) was Duke of Modena and Reggio from 1658 until his death. He was the father of Mary of Modena, consort of James II of England.

Marriage
He married Laura Martinozzi on 27 May 1655 bi proxy at the Palace of Compiègne. She was a niece of Cardinal Richelieu, minister of King Louis XIV of France.

Issue

 * 1) Maria d'Este (called Mary of Modena (5 October 1658 - 7 May 1718) married James II of England and had issue.
 * 2) Francesco II d'Este, Duke o Modena (6 March 1660 – 6 September 1694) married Margherita Maria Farnese but had no issue.