Post by Maltagenealogy.comPost by David Amicushttps://en.wikipedia.org/wiki/Giacomo_Boncompagni
Bastard son of Pope Gregory XIII.
how could he have been the King of Ireland ?
Anyhow, the genealogy of Giacomo Boncompagni is here:
http://genealogy.euweb.cz/italy/boncomp1.html
http://genealogy.euweb.cz/italy/boncomp2.html
* Don Giacomo/Jacopo, legittimated 26.8.1572, Marquess of Vignola, Count of Aquino, Lord of Supino and Rocca Recca 1578, 1st Duke of Sora 1580, 1st Duke of Arce 1583, Patrizio Romano, *Bologna 8.5.1548, +Sora 26.8.1612; m.Roma 5.2.1576 Constanza Sforza, dau.of Sforza Marquess of Castellarquato and Luigia Pallavicino Marquise of Felino (*1550, +22.1.1617)
SON
* Don Gregorio, 2nd Duke of Sora and Arce, Marquess of Vignola, Count of Aquino etc. 1612, *Milano 8.5.1590, +Napoli 13.10.1628; m.1607 Dona Leonor Zapata y Brancia, dau.of don Juan Bautista Zapata y Cisneros Count of Barajas and Caterina Brancia (*Napoli 1593, +Sora 26.4.1679), niece of the Cardinal Antonio Zapata Archbishop of Burgos Vice-Roy of Naples
SON
* Don Giacomo, 3rd Duke of Sora and Arce, Marquess of Vignola, Count of Aquino etc. (1628-36), Senator of Bologna, *1613, +1636
BROTHER
* Don Ugo, 4th Duke of Sora and Arce, Marquess of Vignola, Count of Aquino etc. (1636-76), 1st Prince of Venosa 16.5.1656, Prince of Holy Empire, Senator of Bologna, *Isola di Liri 9.7.1614, +Isola di liri 28.10.1676; m.Napoli 11.2.1641 Donna Maria Ruffo, dau.of Don Francesco 2nd Duke of Bagnara and Donna Guiomar Ruffo from Princes of Scilla (*Bagnara 29.12.1620, +Isola di Liri 5.5.1705)
SON
* Don Gregorio I, 2nd Prince of Venosa, Prince of Holy Empire, 5th Duke of Sora and Arce, Marquess of Vignola, Count of Aquino, Nobile Romano, Patrizio di Bologna etc. (1676-1707), 1st Prince of Piombino, Marquess of Populonia associate to his wife from 27.2.1701, *Isola di Liri 7.7.1642, +1.1.1707; 1m: 1666 Donna Flaminia Gallio, dau.of Don Tolomeo Duke of Alvito and Donna Ottavia Trivulzio from Princes of Musocco (*Milano 29.10.1644, +21.7.1679); 2m: 19.10.1681 Donna Olimpia Ippolita I Ludovisi Princess of Piombino and Marquise of Populonia from 1700 (*Cagliari 24.12.1663, +Roma 29.12.1724), dau.of Don Niccolo 1st Duke of Fiano, Prince of Piombino and Viceroy of Sardinia and Donna Constanza Pamphili
DAUGHTER
* Donna Maria Eleonora I, 2nd ruling Princess of Piombino and Marquise of Populonia (1724-45) with his husband, *Isola di Liri 10.4.1686, +Roma 5.1.1745; m.1702 his uncle Don Antonio I Boncompagni Prince of Piombino, etc. (*10.4.1658 +28.1.1721)
SON
* Don Gaetano I, 4th ruling Prince of Piombino, Marques of Populonia, 7th Duke of Sora and Arce, 4th Prince of Venosa, Prince of Holy Empire, Marquess of Vignola, Count of Conza, Nobile Romano, Patrizio Napoletano, Genovese e Pisano, Nobile di Bologna e Orvieto (1721-77), Great of Spain 1st class from 31.5.1739, *Isola di Liri 8.3.1704, +Roma 24.5.1777; m.1726 Donna Laura Chigi Albani della Rovere (*Roma 20.7.1707, +Roma 8.10.1792), dau.of Don Augusto Prince of Farnese and Donna Eleonora Rospigliosi from Princes Rospigliosi Dukes of Zagarolo
SON
* Don Antonio II, 5th ruling Prince of Piombino (deposed 21.3.1801), Marquess of Populonia, 8th Duke of Sora and Arce, 5th Prince of Venosa, Prince of Holy Empire, Marquess of Vignola, Count of Conza, Nobile Romano, Patrizio Napoletano, Genovese e Pisano, Nobile di Bologna e Orvieto and Great of Spain 1st class (1777-1805), *Roma 16.6.1735, +Roma 26.4.1805; 1m: Roma 25.4.1757 Donna Giacinta Orsini (*1741, +Roma 9.6.1758), dau.of Don Domenico 14th Duke of Gravina, Prince of Solofra and Holy Empire by Pss Donna Anna Paola Flaminia Odescalchi from Princes of Bracciano; 2m: Roma 25.11.1761 Donna Vittoria Sforza Cesarini (*Roma 12.3.1743, +Roma 5.3.1778), dau.of Don Sforza Giuseppe I 4th Duke of Segni, Prince of Genzano and Donna Maria Giustiniani from Princes of Bassano
SON
* Don Luigi Maria, 6th Prince of Piombino, Marquess of Populonia, 9th Duke of Sora and Arce, 6th Prince of Venosa, Prince of Holy Empire, Marquess of Vignola, Count of Conza, Nobile Romano, Patrizio Napoletano, Genovese e Pisano, Nobile di Bologna e Orvieto and Great of Spain 1st class (1805-41), 1st Duke of Monterotondo 1814; he accepted the decisions issued by the Congress of Vienna and renounced to the direct government of Piombino, which was credited to Tuscany, *Roma 22.4.1767, +Roma 9.3.1841; m.Roma 24.11.1796 Pss Donna Maddalena Odescalchi (*Roma 10.8.1782, +Roma 8.3.1846)
SON
* Don Antonio, 7th Prince of Piombino, 7th Prince of Venosa, Prince of Holy Empire, 10th Duke of Sora and Arce, 2nd Duke of Monterotondo, Marquess of Vignola and Populonia, Count of Conza, Nobile Romano, Patrizio Napoletano, Genovese e Pisano etc. Great of Spain 1st class (1841-83), Principe Romano and Nobile Romano Coscritto from 1854, *Roma 11.8.1808, +Milano 10.7.1883; m.Roma 4.10.1829 Donna Guglielmina Massimo, dau.of Don Francesco 1st Duke of Rignano and Donna Caterina Lante della Rovere from Princes of Cantalupo (*Roma 25.11.1811, +Roma 14.2.1899)
SON
* Don Rodolfo, 8th Prince of Piombino, 8th Prince of Venosa, Prince of Holy Empire, Principe Romano, 11th Duke of Sora and Arce, 3rd Duke of Monterotondo, Marquess of Vignola and Populonia, Count of Conza, Nobile Romano, Nobile Romano Coscritto, Patrizio Napoletano etc. and Great of Spain 1st class (1883-1911), title confirmed by italian laws 7.3.1900, Nobile di Rieti confirmed 3.5.1901; chamberlain of the King of Due Sicilie, *Roma 6.2.1832, +Roma 12.12.1911; m.Roma 31.5.1854 Donna Agnese Borghese (*5.5.1836 +22.3.1920)
HEIR Renounced succession - Prince Don Ugo, Duke of Sora, renounced rights for succession, priest from 27.1.1895, Protonotario Apostolico and Vice Camerlengo di Santa Romana Chiesa, *Roma 8.5.1856, +Roma 9.11.1935; 1m: Roma 7.10.1877 Donna Vittoria Patrizi-Naro-Montoro, dau.of Marquess Don Francesco Nobile Romano and Donna Teresa Altieri from Princes of Viano (*Roma 27.4.1857, +Paris 22.1.1883); 2m: Roma 6.6.1884 Donna Laura Altieri (*29.1.1858 +4.5.1892)
GRANDSON
* Don Antonio Francesco, 9th Prince of Piombino, 9th Prince of Venosa, Principe Romano, Prince of Holy Empire, 12th Duke of Sora and Arce, 4th Duke of Monterotondo, Marquess of Vignola and Populonia, Count of Conza, Nobile Romano, Nobile Romano Coscritto, Patrizio Napoletano, Genovese e Pisano, Patrizio di Ravenna, Nobile di Bologna, Jesi, Rieti e Orvieto, Great of Spain 1st class (1911-55), *Villa La Quiete, near Foligno 26.10.1886, +Roma 7.6.1955; m.Roma 20.2.1908 Nicoletta Prinetti Castelletti, dau.of Marquess Giulio and Francesca from Marquis d'Adda-Salvaterra (*Roma 19.3.1891, +Roma 2.3.1931)
SON
* Don Gregorio, 10th Prince of Piombino, 10th Prince of Venosa, Prince of Holy Empire, Principe Romano, 13th Duke of Sora and Arce, 5th Duke of Monterotondo, Marquess of Populonia and Vignola, Count of Conza, Nobile Romano, Nobile Romano Coscritto etc., Great of Spain 1st class (1955-88), *Roma 28.6.1910, +Roma 8.2.1988; m.Roma 12.4.1939 Bonaccorsa Aliotti, dau.of Baron Carlo and Ester Fiorenza Vignoles (*Paris 12.12.1908, +Roma 21.12.1995), widow of Paolo Parodi Delfino
SON AND CURRENT.
Don Niccolo Francesco, 11th Prince of Piombino, 11th Prince of Venosa, Prince of Holy Empire, Principe Romano, 14th Duke of Sora and Arce, 6th Duke of Monterotondo, Marquess of Populonia and Vignola, Count of Conza, Nobile Romano, Nobile Romano Coscritto, Patrizio Genovese, Napoletano e Pisano, Nobile di Orvieto, Bologna, Rieti, Ravena and Jesi and chef of the House Boncompagni-Ludovisi (1988-), *Roma 21.1.1941; 1m: Roma 8.7.1964 (div Roma 4.2.1985) Donna Benedetta Barberini Colonna di Sciarra (*3.5.1943); 2m: Riano 20.4.1992 Ludmilla Sisova (*Baku 8.12.1953)
His family:
[1m.]
1. Prince Don Francesco, *Geneva 29.6.1965; m.Roma 15.10.1995 Violante Guerrieri Gonzaga, dau.of Marquess Carlo and Donna Maria Federica Gallarati Scotti from Princes of Molfetta (*Roma 21.8.1970)
1.1. Princess Donna Lavinia Maria, *Roma 7.9.1996
1.2. Prince Don Gregorio, *Roma 23.12.1997
2. Prince Don Ignazio, *Geneva 12.2.1967; m.19.7.1997 Giaia Bulgari
2.1. Princess Donna Maria, *23.3.1998
2.2. Princess Donna Constanza, *7.2.2000