Guglielmo Gonzaga, Duke of Mantua

Guglielmo Gonzaga (24 April 1538 – 14 August 1587) was Duke of Mantua from 1550 to 1587, and of Montferrat from 1574 to 1587. He was the second son of Federico II Gonzaga, Duke of Mantua and Margaret Palaeologina of Montferrat. In 1574, Montferrat was elevated to a Duchy and Guglielmo became its first duke. He was succeeded as Duke of both duchies by his son Vincenzo.

Marriage
On 26 April 1561 Guglielmo married Eleonora of Austria, sixth daughter of Ferdinand I, Holy Roman Emperor and Anna of Bohemia and Hungary.

Issue

 * 1) Vincenzo I, Duke of Mantua (21 September 1562 – 9 February 1612) married Eleonora de' Medici
 * 2) Margherita Gonzaga (27 May 1564 – 6 January 1618) married Alfonso II d'Este
 * 3) Anna Caterina Gonzaga (17 January 1566 – 3 August 1621) married Ferdinand II, Archduke of Austria