Gregorio II Boncompagni
Gregorio II Boncompagni (7 July 1642 – 1 January 1707) was an Italian nobleman and the 5th Duke of Sora. He was the grand-nephew of Pope Gregory XIII He married Giustina Gallio (29 October 1644 – 21 July 1679) and then, when she died, he married Ippolita Ludovisi on 19 October 1681. The "Boncompagni-Ludovisi" union lasted until the French Revolution and included the development of the "Archivio Boncompagni-Ludovisi" held by The Vatican. Gregorio and Ippolita had six children: