Galeazzo Maria Sforza
Galeazzo Maria Sforza (24 January 1444 – 26 December 1476) was the fifth Duke of Milan from 1466 until his assassination a decade later.
He was notorious for being lustful, cruel and tyrannical.
He was born to Francesco Sforza, a popular condottiero and ally of Cosimo de' Medici who would gain the Duchy of Milan in 1450, and Bianca Maria Visconti.
He married into the Gonzaga family; on the death of his first wife Dorotea Gonzaga, he married Bona of Savoy.
Ippolita Maria Sforza (1493–1501)
Ippolita Maria Sforza( 26 January 1493 – 1501) was the daughter of Gian Galeazzo Sforza of Milan and Isabella of Naples.
She was also the niece of Bianca Maria Sforza, who in 1493 had married Holy Roman Emperor Maximilian I.
She was named after her maternal grandmother, Ippolita Maria Sforza.
She was engaged to Ferdinand of Aragón, Duke of Calabria.
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.
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.
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.
Zanetto Bugatto
Zanetto Bugatto( Milan 1433- Pavia or Milan~ 1476), also known as Zanetto Bugatti, was one of the most well documented court portraitists of the 1400s.
A key painter of the Lombardy region, Bugatto worked for 15 years for the first two Sforza Dukes of Milan, particularly Duke Galeazzo Maria Sforza and his Duchess Bona of Savoy.
His work was influenced by artists such as Rogier van der Weyden, Andrea Mantegna, and Jean Fouquet, all of whom he met during his travels.
Bugatto ’s work was described by Galeazzo ’s ambassador Leonardo Botta as being similar to Sicilian painter Antonello da Messina.
It is not clear whether Bugatto painted works other than portraits which he typically made on panel and in fresco.
He is notable for being one of the first Italian artists, along with Antonello da Messina, to focus on portraiture in the Netherlandish style to such an exclusive extent.
Bugatto is credited with establishing the official likenesses of Galeazzo Sforza and his wife Bona of Savoy through several portraits, medals, and coins.
Though he has no surviving signed or directly accredited works, the unusual level of documentation from Bugatto ’s commissions with the Sforza have allowed art historians to attribute to Bugatto the ducal" Portrait of Galeazzo Maria Sforza" in the Castello Sforzesco( pictured at right).
There is some debate over whether the 1467 ducat coins of Galeazzo Maria Sforza may also be Bugatto's work.
Several other surviving works are argued to be either direct copies or heavily influenced by Bugatto ’s works.
No surviving portraits or images of Zanetto Bugatto himself are known to exist.
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.
Colinet de Lannoy
Colinet de Lannoy( died before 6 February 1497) was a French composer of the Renaissance.
He was one of the composers/ singers working at the Milan chapel at the time of the assassination of Duke Galeazzo Maria Sforza in 1476, and he possibly also worked in France.
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.
Bianca Maria Visconti
Bianca Maria Visconti (31 March 1425 – 28 October 1468) was Duchess of Milan from 1450 to 1468.

Question: When was Galeazzo Maria Sforza's mother born?
Answer: 31 March 1425