Jean IV de MauquenchyJean IV de Mauquenchy, Lord of Blainville, also known as Mouton de Blainville, was a French soldier and nobleman. He was a Marshal of France during the Hundred Years' War.BiographyIn 1370, with Bertrand du Guesclin, they defeated an English army beneath the walls of the Château de la Faigne and captured the commander Thomas de Grandison.