– 25 October 1415) was lord of Bueil-en-Touraine, son of Jean III de Bueil.
Jean IV lived in the shadow of his father (an important royal official and military officer) until he succeeded him in November 1405.
On 9 September 1386, for example, the company of Jean de Bueil “the younger”, knight bachelor, composed of 16 other knights, 179 squires, and 3 archers, was mustered at Mantes and scheduled to serve — under the command of Jean de Bueil “the elder” [knight banneret], who was under the command of Philip the Bold, duke of Burgundy — in the army Charles VI intended to lead in person against England, but the expedition had to be “postponed,” after long delays, because bad weather threatened to make a crossing of the Channel extremely hazardous.
[1] In 1406, as lord of Saint-Calais (Sarthe), Jean was in a position of having to proceed with the court case involving the inhabitants of that castellany that was pending when his father died.
[4] Jean married his second wife, Marguerite Dauphine of Auvergne (youngest daughter of Berald II), in 1404,[5] and they had three children: Jean V de Bueil, count of Sancerre and admiral of France, Louis de Bueil, who died a few hours after sustaining a serious injury in a tournament in 1447,[6] and Anne de Bueil, wife of Pierre d'Amboise.