[1] Their titles and fiefs were numerous: Duke of Nevers and Donzy, Prince of Vergagne and of the Holy Roman Empire with the style of Serene Highness, French Peer, Spanish Grandee, Marquis of Fusignano, Count of Montefortino, Viscount of Clamecy, Baron of Tardello, Tumminii and Ogliastro, Lord of Claye-Souilly, Roman noble and Venetian patrician.
The Naples line was descended from Domenico Nicola Mancini who was nominated Marquis of Fusignano by the Prince Francesco of Este, son of the Duke Alfonso of Este, and he moved to the Kingdom of Naples in 1527; Domenico Nicola III, 5° Marquis of Fusignano gained the title of Count Mancini in 1745 by the Pope Benedict XIV; it had as most important member the Count Pasquale Stanislao Mancini (1817–1888), 8° Marquis of Fusignano, illustrious jurist, writer and three times Minister of The Kingdom of Italy (public education, justice and foreign affairs).
b) was descended from Francesco Mancini, consanguineous of the Cardinal Giulio Mazzarino, who moved to Catania in the 17th century as Attorney-General of the Prince Marco Antonio Colonna and his wife Isabella Gioeni.
The son Giuseppe Alessandro Luigi (1852–1903), Belle-Epoque dandy, married donna Maria Antonietta Marinelli (1862–1911), daughter of the noble Vittorio Leonardo of the marquesses Marinelli, in 1882; they had seven children along which Carlo Alberto Antonio (1883–1940), horse owner who married a noblewoman of german descent, Maria Concetta Cassone Simeoni-Wrbna, patrician of Benevento (1886–1965) in 1911.
His son Count Adriano Fulvio Mario Mancini (1952)[6] Arabian horse breeder and entrepreneur on the advertising industry, member of the Società Genealogica Italiana, Commander of the Sovereign Order of Saint John of Jerusalem.