Isabella of Portugal, Duchess of Burgundy

Isabella of Portugal was Duchess of Burgundy as the third wife of Duke Philip the Good. Born a Portuguese infanta of the House of Aviz, Isabella was the only surviving daughter of King John I of Portugal and his wife Philippa of Lancaster. Her son by Philip was Charles the Bold, the last Valois Duke of Burgundy. Isabella was the regent of the Burgundian Low Countries during the absence of her spouse in 1432 and in 14411443. She served as her husbands representative in negotiations with England regarding trade relations in 1439 and those with the rebellious cities of Holland in 1444.

Isabella was born to John I of Portugal and Philippa of Lancaster, who had six children survive infancy. Born in 1397 in vora, and raised in the Portuguese court in Lisbon, Isabella was the fourth child and only daughter to survive to adulthood. Phillippa instilled in all her children, including her daughter, a sense of duty, faith and belief in education. Isabella was an avid reader and held an interest in politics. Her father ensured that she was given a good understanding of politics, joining her brothers in their instructions in affairs of state and she became proficient in Latin, French, English and Italian during her studies with the princes. She was fond of riding and hunting with her brothers.

Source: Wikipedia