Joan of Navarre, also known as Joanna (c. 1368 – 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.
Joan was born in October 1165 at Château d'Angers in Anjou as the seventh child of Henry II, King of England and his queen consort, Eleanor of Aquitaine. She spent her youth at her mother's courts at Winchester and Poitiers. As a young Angevin princess, Joan's early education consisted of subjects to ready her for a dynastic marriage.