is no record of Arnulf as count of Loon. Haspinga has been interpreted as being either the same as the county of Loon () or as a lordship which held Loon under it (Baerten, and others), although it might simply have been one geographical part of Hesbaye, different to the one his brother held. Connected to this open question, not only is the parentage of Giselbert, Arnulf and Balderic unknown, but also their connection to the next two count brothers, Emmo and Otto, is considered uncertain. They are thought to be the sons of either Giselbert or Arnulf. While Giselbert is the obvious proposal, lean towards the position of Verhelst, and favor Arnulf as their father. A major argument for the position of Verhelst is that Emmo named his son and heir Arnulf/Arnold, and the name Giselbert was never used by his descendants. (Otto the brother of Emmo named his son Giselbert, but according to this proposal this name commemorates another Giselbert who was advocatus of St Truiden, as were both Otto and his son.) 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. History In the generation after the 3 brothers Balderic, Gilbert, and Arnulf, Count Emmo became the next count of Loon while his brother Count Otto was advocatus of the Abbey of St Truiden, and the ancestor of the first line of counts of Duras, perhaps through his wife Oda. The county of Duras was inherited by Otto's son Giselbert, and in turn by his son Otto. It eventually became part of Loon, under Count Gerard in the 1190s. Count Arnold (or Arnulf) I, the son of Emmo, is according to Baerten (1969 p. 40), the first Count of Loon for whom we can discuss any political activity. In 1106 he was able to strengthen his position, when he acquired the possessions of the extinct Counts of Rieneck through his marriage. He also probably built the motte-and-bailey