Isabella of Navarre was the younger surviving daughter of Charles III of Navarre

Charles III of Navarre

Charles III , called the Noble, was King of Navarre from 1387 to his death and Count of Évreux from 1387 to 1404, when he exchanged it for the title Duke of Nemours...

 and his wife Eleanor of Castile

Eleanor of Castile (d. 1416)

Eleanor of Castile was an infanta of Castile and the Queen consort of Navarre.She was the daughter of King Henry II of Castile and his wife, Juana Manuel of Castile, from a cadet branch of the Castilian royal house...

. She was a member of the House of Évreux

House of Évreux

The House of Évreux was a noble French family, a cadet branch of the Capetian dynasty, which flourished from the beginning of the 14th century to the mid 15th century. A branch of it came to rule the Kingdom of Navarre....

.

Early Life and Family

Shortly before Isabella's birth, her mother was dealing with problems in Castile, involving her brother John I of Aragon

John I of Aragon

John I , called by posterity the Hunter or the Lover of Elegance , but the Abandoned in his lifetime, was the King of...

. Eleanor was forced to return to Navarre for her daughter's birth.

Isabella was the sixth of eight children. Her two younger brothers died in childhood, leaving Isabella and her five older sisters. Her sisters included: Joanna

Joan, Heiress of Navarre

Joan of Navarre also known as Jeanne d'Évreux or Joanna was the eldest child of Charles III of Navarre by his wife Eleanor, daughter of Henry II of Castile....

 (died before inheriting the throne), Blanche

Blanche I of Navarre

Blanche I was Queen of Navarre from 1425 to 1441. She became queen regnant upon the death of her father King Charles III of Navarre...

 (successor of their father) and Beatrix

Beatrice of Navarre (1392–1412)

Beatrice of Navarre was a daughter of Charles III of Navarre and his wife Eleanor of Castile.- Biography :She was a member of the House of Évreux...

, (married James II, Count of La Marche

James II, Count of La Marche

James II of Bourbon-La Marche was the son of John I, Count of La Marche and Catherine of Vendôme.-Early life:...

)

Isabella's maternal grandparents were Henry II of Castile and Juana Manuel of Castile

Juana Manuel of Castile

Juana Manuel was from 1369 the Queen consort of Castile. She also was the heiress of Escalona, Villena, Peñafiel and Lara as well as the sovereign lady of Biscay .- Family :...

. Her paternal grandparents were Charles II of Navarre

Charles II of Navarre

Charles II , called "Charles the Bad", was King of Navarre 1349-1387 and Count of Évreux 1343-1387....

 and Joan of France, herself daughter of John II of France

John II of France

John II , called John the Good , was the King of France from 1350 until his death. He was the second sovereign of the House of Valois and is perhaps best remembered as the king who was vanquished at the Battle of Poitiers and taken as a captive to England.The son of Philip VI and Joan the Lame,...

 and Bonne of Bohemia

Bonne of Bohemia

Bonne of Luxemburg, Duchess of Normandy, Countess of Anjou and of Maine , was born Jutta , the daughter of John the Blind of Luxemburg, king of Bohemia and his first wife Elisabeth of Bohemia. She was the first wife of King John II of France; however, as her death occurred a year prior to his...

.

Marriage

Isabella was firstly betrothed to Infante John of Aragon

John II of Aragon

John II the Faithless, also known as the Great was the King of Aragon from 1458 until 1479, and jure uxoris King of Navarre from 1425 until his death. He was the son of Ferdinand I and his wife Eleanor of Alburquerque...

  around 1414. Her mother, Queen Eleanor bequeathed her money for the marriage. John later became King of Aragon but broke off his contract with Isabella and instead married her sister Blanche as she was Queen of Navarre.

Isabella eventually married on 10 May 1419 John IV of Armagnac

John IV of Armagnac

John IV was a Count of Armagnac, Fézensac, and Rodez from 1418 to 1450. He was the son of Bernard VII of Armagnac, Count d' Armagnac, of Fézensac, Pardiac, and Rodez; and the brother of Bernard of Armagnac, Count of Pardiac, of La Marche and Duke of Nemours...

. This marriage was John's second marriage, after the death of his first wife Blanche of Brittany, who had left no sons.

Isabella and John had five children:

• Marie of Armagnac (b. 1420; † 1473), married in 1437 John II of Alençon
  John II of Alençon
  John II of Alençon was the son of John I of Alençon and Marie of Brittany. He succeeded his father as Duke of Alençon and Count of Perche as a minor in 1415, after the latter's death at the Battle of Agincourt.He saw action as a young man at the Battle of Verneuil on 17 August 1424, and was...
  
   (b. 1409; † 1476), Duke of Alençon; maternal great-grandparents of King Henry IV of France
  Henry IV of France
  Henry IV , Henri-Quatre, was King of France from 1589 to 1610 and King of Navarre from 1572 to 1610. He was the first monarch of the Bourbon branch of the Capetian dynasty in France....
  
  .
• John V of Armagnac (b. 1420; † 1473), Viscount of Lomagne, then Count d' Armagnac, of Fézensac and Rodez. He married illegally to younger sister Isabella, had issue and married secondly to Joan of Foix, also with issue.
• Eleanor (b. 1423; † 1456), married in 1446 Louis de Chalon (b. 1389; † 1463), Prince d'Orange, Lord of Arlay and Arguel, had issue
• Charles I (b. 1425; † 1497), Viscount of Fézensaguet, then Count d' Armagnac, of Fézensac and Rodez
• Isabella (b. 1430; † 1476), Lady of the Four-Valleys, married illegally to brother John and had issue.

Isabella and her husband both died in 1450; she died in August and he died three months later in November, she was around fifty-four at the time of death.

Ancestry