In 1336, Joan was betrothed to the eldest son of Otto, Duke of Austria, with the stipulation that she would receive her education at the Austrian court.

[5] However, Edward III showed reluctance in sending her and delayed her departure, promising that he would personally accompany her the following year.

[7][6] Later, they traveled to Koblenz, where they met Louis IV, Holy Roman Emperor,[8][9] and were his special guests at the Imperial Diet in the church of Saint Castor.

Edward III was crowned vicar-general of the Holy Roman Empire and formed an alliance with Louis against Philip VI of France,[10][11][9] but in 1341 the emperor deserted him.

[19] Some accounts document that Joan was buried in Bordeaux Cathedral, and her statue, in Westminster Abbey, is on the South Side of her father's tomb.