Guillaume IV de Melun, Count of Tancarville, Lord of Montreuil-Bellay, was a French politician, chamberlain and advisor to King Charles VI of France. He was one of the marmousets who governed France between 1388 and 1392.
- Occupation
- military personnel
- Position held
- Grand Chamberlain of France, Grand Butler of France, Constable of Normandy
- Born
- 1301
- Died
- October 25, 1415, 1417