Bona of Savoy
Bona of Savoy, Duchess of Milan( 10 August 1449 – 23 November 1503) was Duchess consort of Milan as the second spouse of Galeazzo Maria Sforza, Duke of Milan.
She served as regent of Milan during the minority of her son 1476 – 1481.
Francesco Alvaro Maria Giorgio Ruspoli, 1st Duke of Morignano
" Don" Francesco Alvaro Maria Giorgio dei Principi Ruspoli( April 19, 1891 – March 2, 1970) was an Italian nobleman, the 1st Duca di Morignano, Nobile di Viterbo e di Orvieto, Patrizio Romano and Prince of the Holy Roman Empire.
Born in Rome, he was the son of Emanuele Ruspoli, 1st Prince of Poggio Suasa and third wife Josephine Mary Beers- Curtis.
Charles Lennox, 2nd Duke of Richmond
Charles Lennox, 2nd Duke of Richmond, 2nd Duke of Lennox, 2nd Duke of Aubigny,( 18 May 17018 August 1750) was a British nobleman, peer, and politician.
He was the son of Charles Lennox, 1st Duke of Richmond, an illegitimate son of King Charles II.
He held a number of posts in connection with his high office but is best remembered for his patronage of cricket.
He has been described as the most important of the sport's early patrons and did much to help its evolution from village cricket to first- class cricket.
Carlo Emanuele Ruspoli, 3rd Duke of Morignano
"Don" Carlo Emanuele Maria (Carlos Manuel María) Ruspoli (born 29 October 1949) is a nobleman and architect.
Firstborn son of Galeazzo Maria Alvise Emanuele Ruspoli, 2nd Duke of Morignano and first wife "Doña" María Elisa Soler y Borghi (San Salvador, 25 June 1926 – Madrid, 15 November 2016), of the Marquises of Rabell.
He is Doctor of Architecture of the University of Rome, writer and researcher.
Edmond de Talleyrand-Périgord
Edmond de Talleyrand- Périgord, 2nd Duke of Talleyrand, 2nd Duke of Dino( 1 August 1787, Paris – 14 May 1872, Florence), was a French general of the Napoleonic Wars.
Anna Sforza
Anna Maria Sforza( 21 July 1476 – 30 November 1497) was a Hereditary Princess of Ferrara as the first wife of Alfonso I d' Este, future Duke of Ferrara.
She was the second legitimate daughter of Galeazzo Maria Sforza, Duke of Milan, by his second wife, Bona of Savoy.
Carlo Visconti
Carlo Visconti( died 2 January 1477) was an Italian, who was a member of the prominent Visconti family, and a government secretary in Milan's Council of Justice, he was executed for being the assassin of Galeazzo Maria Sforza, the Duke of Milan.
Bianca Maria Sforza
Bianca Maria Sforza (5 April 1472 – 31 December 1510) was a Queen of the Romans and Holy Roman Empress as the third spouse of Maximilian I, Holy Roman Emperor.
She was the eldest legitimate daughter of Galeazzo Maria Sforza, Duke of Milan, by his second wife, Bona of Savoy.
Galeazzo Maria Alvise Emanuele Ruspoli, 2nd Duke of Morignano
" Don" Galeazzo
Maria Alvise Emanuele dei Principi Ruspoli( March 27, 1922 – February 21, 2003) was the 2nd Duca di Morignano, Nobile di Viterbo e di Orvieto, Patrizio Romano and Prince of the Holy Roman Empire, only son of Francesco Alvaro Maria Giorgio Ruspoli, 1st Duke of Morignano and wife" Donna" Josefa Giuseppina Pia dei Conti di Brazzà- Cergneu- Savorgnan, Nobile Romana and Patrizia Sabina.
He was Doctor of Architecture of the University of Rome.
Lucrezia Landriani
Lucrezia Landriani( born c. 1440) was the mistress of Galeazzo Maria Sforza, Duke of Milan, and the mother of his renowned illegitimate daughter, Caterina Sforza, Lady of Imola, Countess of Forlì.
Lucrezia had three other children by the Duke, and two by her husband.

Question: Who is Galeazzo Maria Alvise Emanuele Ruspoli, 2Nd Duke Of Morignano's paternal grandfather?
Answer: Emanuele Ruspoli, 1st Prince of Poggio Suasa