[3] He is the source for the story that Olivier V de Clisson, while serving as constable of France, would annually remind the minor-aged Charles VI that he was a year closer to assuming full powers[4] By 1385, Jean had become prominent at the royal court.
[5] In 1402, during a period of lucidity, Charles VI dismissed his uncle, John, Duke of Berry, from the regency and appointed Louis.
[5] Jean married Joan, daughter of Raimond de Montaut, lord of Mussidan and Blaye, a short time before her father's death in July 1406.
By his will Raimond had designated Joan's unmarried sister Marie as his heiress and required her to remain loyal to the English crown.
[5] Jean was still living in 1413–15, when he reached agreements with Isabeau, the sister and heiress of Amaury II de Clisson.