Agnès de Picquigny

https://en.wikipedia.org/wiki/Bernard_II_de_Balliol

Bernard de Balliol is last found in the historical records in the year 1189, at Dover conducting an agreement with the Bishop of Durham at the court of King Richard the Lionheart; he was succeeded in the following year by his cousin Eustace.[1]

He married a woman named Agnes de Picquigny, whose exact origins are a matter of historical debate.[1] Despite popular claims, Bernard had no recorded children, and his successor was his cousin Eustace de Helicourt, who (re)took the Balliol name and renamed himself Eustace de Balliol.[1]

1. Stell, G. P., "Balliol, Bernard de (d. c.1190)", Oxford Dictionary of National Biography, Oxford University Press, 2004 , accessed 24 Jan 2008