Guillaume IV de Melun was the son of Jean II (Viscount) de Melun and Jeanne Crespin, married by contract signed on 4 September 1389 and celebrated on 21 January 1390 to Jeanne de Parthenay Larchevêque,[1] who gave him a child named Marguerite de Melun, Viscountess of Tancarville.[2]
In 1393 he was sent to England to establish a peace treaty until the recovery of King Charles VI's health.[3] In 1396 he went to Italy to take possession of the Republic of Genoa, which had been given to the king.[3] He went to Florence and Cyprus to enter into treaties of alliance.[3] On his return to France he was appointed Grand Butler of France and the first president of the Court of Accounts on 29 April 1402.[3][4] Guillaume IV de Melun was also employed in many other important occasions and killed at the Battle of Agincourt on 25 October 1415.
