The 18th century version of this castle still stands and is a part of modern Sint-Truiden in the province of Belgian Limburg.
The first certain counts of Duras were under-advocates (subadvocati) of the abbey, who were responsible for exercising the secular aspects of lordship on their worldly estate, such as death penalties and military matters.
As pointed out by de Borman, and later Ulens, while there is no definitive or clear list of the lands held by the counts of Loon or Duras until after they merged, 14th-century records show that there was a fief within the greater feudal county of Loon which was named as the Duras (sometimes spelled in those documents as "Der As") fief.
This fief was surprisingly not limited to areas near the castle of Duras, but intermingled within the lands of the Counts of Loon.
In the time of Otto, in the 11th century, county names and forms were still developing into the more stable entities of the ancien regime.
Only the 14th century Gesta continuator calls Otto a Count of Duras, and Baerten doubted that he was thought of this way in his own time.
Alternatively, the earlier advocates of St Truiden may for example have originally been assigned one-by-one by their clerical superiors in Metz.
A similar confirming record made by her son Count Godfried appears in the cartularium of St Truiden.
Her name appears as an ancestor, or at least predecessor, in various donations made by the family of the counts of Duras in the twelfth century, including one confirmed by Henry II of Leez, Prince-Bishop of Liège, in 1164.