The division of Lotharingian territories agreed 8 Aug 870 between Ludwig II "der Deutsche" King of the East Franks and his half-brother Charles II "le Chauve" King of the West Franks allocated "comitatum Lomensem" to King Charles The earliest specific mention so far identified of a count in this pagus is a charter dated 884.
Thereafter, only isolated references have been found until the early 10th century.
It has not yet proved possible to prove any family relationship between the earliest counts (see Chapter 1).
Berengar, referred to in early 10th century sources as count in the pagus Lommensis, is first named as Comte de Namur in a charter dated 919.
As the county of Namur continued to lie within imperial jurisdiction, it is unclear why use of the title would not have continued, despite the territory being held by a younger branch of the family of the counts of Flanders who were at that time vassals of the kings of France.
One possibility is that the Flemish counts did not wish the junior branch of their family to bear a title which was hierarchically superior to their own.
However, the only evidence so far identified that Robert may have been a descendant of Berengar is provided by the Vita Gerardi Abbatis Broniense which records that "comes Berengarius Nammucensi castro prsidebat" commenting that "cuius stirpis posteritas ibidem hactenus perstat".
It is not therefore a safe assumption, in the absence of further documentary proof, that Berengar owed his position in [I] ([920/25]-before 981).Jean III Comte de Namur, last legitimate descendant in the male line of Comte Jean I, the Burgundian territories in the Low Countries which, by a twist of dynastic fate, passed to the Habsburg family as a result of the marriage in 1477 of Marie, daughter and heiress of the last Valois duke of Burgundy, to Archduke Maximilian. This document represents the earliest mention so far identified of a specific count in "comitatus Lomacensis", although the edition indicates doubts about the authenticity of the charter.It is unclear from the text whether Count Robert was count within the territory but this is a reasonable assumption. His birth date is estimated on the assumption that he was adult when he is named in the charter dated 907 (see below). "Hludouucusrex" confirmed the donation by "bone memori Kisala illustris femina" of the abbey of Fosse "in pago Lominse in comitatu Perengarii" to the church of Lige with the consent of "Kepeharticomitis" by charter dated 26 Oct 907 in which among "fidelium nostrum" was listed "Purchart filius Vualahonis".The arrangement did not specify the fate of Luxembourg, but Comte Henri continued to rule this county. Thibaut I Comte de Bar, who married Ermensende de Luxembourg in 1197, besieged Philippe Marquis de Namur in his castle and forced the negotiation of the Treaty of Dinant (signed ), under which Baudouin IX Count of Flanders and Hainaut (older brother of Marquis Philippe) inherited the larger part of the county of Namur, while Ermensende retained the counties of Luxembourg, Durbuy and La Roche, as well as that part of the county of Namur which lay on the right bank of the river Meuse.On the death of Marquis Philippe in 1212, Namur was inherited by his sister Yolande, the wife of Pierre [II] Seigneur de Courtenay who was later elected as Pierre I Latin Emperor of Constantinople (see Chapter 3).