Gian Maria Visconti [SEP] father
Gian Maria Visconti
Gian Maria Visconti (or Giovanni Maria; 7 September 1388 in Abbiategrasso – 16 May 1412) was the second Visconti Duke of Milan, the son of Gian Galeazzo Visconti and Caterina Visconti. 
Biography.
He assumed the title at thirteen, under his mother's regency. The Duchy of Milan soon disintegrated: among the various parties contending its lands, the condottiero Facino Cane prevailed. 
Taking advantage of Gian Maria's cruelty, he managed to create in him doubts about Caterina, who was imprisoned
reasons of security" given to her father: in fact, Gian Galeazzo wanted to amend the marriage contract after the pregnancy of his second wife Caterina Visconti (another Bernabò's daughters) ended. Only after the birth of his son Gian Maria on 7 September 1388 did he feel secure enough to send his daughter to France.
Escorted by her paternal cousin Amadeus VII, Count of Savoy and a retinue of 300 knights, Valentina was finally handed to Louis's envoys. The formal marriage took place in the city of Melun