Gregorio II Boncompagni
Gregorio II Boncompagni was an Italian nobleman and the 5th Duke of Sora. He was the grand-nephew of Pope Gregory XIII
He married Giustina Gallio 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:
- Hugo died young
- Maria Eleonora, Princess of Piombino, married Antonio Boncompagni
- Constance, married Vincenzo Giustiniani, Prince of Bassano
- Maria Teresa, married Urbano Barberini, Prince of Palestrina
- Giulia, married Marco Ottoboni, Duke of Fiano
- Anna Maria, married Gian Vincenzo Salviati, Duke of Giuliano
