Aubrey de Coucy was the earl of Northumbria from 1080 until about 1086. In 1080, William Walcher, bishop of Durham and earl of Northumbria, was murdered during a feud between his household knights and the old Northumbrian aristocracy. William the Conqueror then gave the earldom to Aubrey, a Norman baron from Coucy^[1] with large possessions in the midlands.^[2].

However, de Coucy soon resigned, probably shortly after a threat of Danish invasion in 1085. He is listed as a tenant in the Domesday Book, but the notices suggest that he had recently forfeited his English possessions.^[3] According to the chronicler Symeon of Durham, de Coucy, "being of very little use in difficult affairs, returned to his country".^[4] Robert de Mowbray was then given the earldom.

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