Joan of Navarre, also known as Joanna ( – 10 June 1437) was Duchess of Brittany by marriage to Duke John IV and later Queen of England as the second wife of King Henry IV. She served as regent of Brittany from 1399 until 1403 during the minority of her son. She also served as regent of England during the absence of her stepson Henry V in 1415. Four years later he imprisoned her and confiscated her money and land. Joan was released in 1422, shortly before Henry V's death. Joan was a daughter of Charles II of Navarre and Joan of France. Duchess of Brittany On 2 October 1386, Joan married her first husband, Duke John IV of Brittany (known in traditional English sources as John V). She was his third wife and the only one with whom he had children. John IV died on 1 November 1399 and was succeeded by his and Joan's son, John V. Her son being still a minor, she was made his guardian and the regent of Brittany during his minority. Not long after, King Henry IV of England proposed to marry her. The marriage proposal was given out of mutual personal preference rather than a dynastic marriage. According to the Encyclopædia Britannica, affection developed between Joan and Henry while he resided at the Breton court during his banishment from England. Joan gave a favourable reply to the proposal, but stated that she could not go through with it until she had set the affairs of Brittany in order and arranged for the security of the duchy and her children. Joan knew that it would not be possible for her to continue as regent of Brittany after having married the king of England, nor would she be able to take her sons with her to England. A papal dispensation was necessary for the marriage, which was obtained in 1402. She negotiated with the duke of Burgundy to make him guardian of her sons and regent of Brittany. Finally, she surrendered the custody of her sons and her power as regent of Brittany to the duke of Burgundy, who swore to respect the Breton rights and law, and departed for England with her daughters. Queen of England On 7 February 1403, Joan married Henry IV at Winchester Cathedral. On the 26th, she held her formal entry to London, where she was crowned queen of