Blanche I of Navarra.

(1387 - 1441) she was Countess de Nemours and Queen of Navarre.

Family origins.

Daughter of Charles III of Navarre and his wife Eleanor of Castile. She was named heiress of the Kingdom of Navarre on 28 October 1416 by her father, being the larger of the two surviving daughters of marriage only.

Marriage and descendants:

On 21 May 1402 she married, by proxy, at the Cathedral of Catania and 26 December of the same year she married, in person, with Martin "The Young ', King of Sicily. From this marriage was born a son; 

- Prince Martin of Aragon. Crown Prince of the Kingdom of Sicily, who died at 4 years of age.

On the death of her husband, the king of Sicily, in 1409, Blanche came to govern the island, but finally returned to Navarre and married again.

On 6 November 1419 she married, by proxy, at the Church of Olite and June 10, 1420 did, in person, at the Cathedral of Pamplona with Prince John of Aragon, King of Aragon future, more known as John the king "Without Faith". From this union were born: 

- Prince Charles of Aragon. Crown Prince of Aragon and Navarre. 

- Princess Johanna of Aragon. Died in infancy. 

- Princess Blanche II of Navarre. Queen of Navarre and Queen consort of Castile. 

- Princess Eleanor I of Navarre. Queen consort of Navarre and Countess of Foix.

Reign.

The loss of initiative characterized her reign. So, for her marriage to the king of Aragon, she allowed the kingdom of Navarre becomes subject at all to the will of the king of Aragon and their interests, losing (the kingdom) border territories as a result of the intervention of John II in affairs of Castile between 1428 and 1429.

From the junction with John II, Prince Charles of Aragon was born that, according to the marriage settlement of 1419, had to inherit the Kingdom of Navarre after the death of his mother. But in the year 1441 the Queen died, John "Without Faith", usurped the throne of Navarre claiming that, in the will of the late Queen recommended to Charles did not crowned king without the consent of his father. The result was a 4-year civil war that ended with the death of Prince Charles.