Лоон
Another important charter in discussions about the origins of the County of Loon is the 1078 grant by Countess Ermengarde to the Bishop of Liège, of allodial land in key places in the Count of Loon. Her possessions can not be explained by her proposed ancestry, or her known husband, and so it has long been suggested (for example by Vanderkindere, Baerten, and Kupper) that she must have first married a Count of Loon, normally presumed to be Arnold, because he is normally presumed to have had no heirs.