LUXEMBOURG Ermesinde

Bef 1086 - 1141  (> 55 years)

• Name	LUXEMBOURG Ermesinde
  Birth	Bef 1086	Luxembourg, Upper Lotharingia, Holy Roman Empire
  Gender	Female
  Death	26 Jun 1141
  Notes	Ermesinde (lat: Ermensendem) de Luxembourg (later Comtesse de Namur) was the daughter of Conrad I Comte de Luxembourg and his wife Ermesinde de Poitou. Ermesinde is presumed to have been born in or near Luxembourg (where her parents were the count and countess) - and while her date of birth is unknown, it is prior to 1086 (when her father died). [1] [2] Her father Conrad became Comte de Luxembourg in about 1057 (1056-59). He was later excommunicated in connection with the capture of Eberhardus, the Archbishop of Trier, who died in 1066. The excommunication was to be lifted following a pilgrimage to the Holy Land on which Conrad himself died on 8 Aug 1086, on his planned return from Palestine (never reaching Italy). [1] [3] Parents and Siblings Conrad's first marriage was to Ermesinde de Poitou. She is considered to have been a granddaughter of Guillaume V "le Grand" Duc d'Aquitaine (Guillaume III Comte de Poitou (see Research Notes below regarding Ermesinde de Poitou). [1] Conrad's second marriage, presumably after the death of Ermesinde de Poitou, was to a woman named Clementia whose surname is not certain but who is considered likely to have been a member of the Braunschweig family. [1] Conrad had as many as eight reported children - of which three sons and two daughters are considered certain: [1] Henri de Luxembourg - who in 1086 succeeded his father as Henri II Comte de Luxembourg Guillaume / William de Luxembourg - who married Liutgard von Beichlingen; succeeded his brother in about 1096 as Guillaume I Comte de Luxembourg and was succeeded by his son in about 1130 who became Conrad II Comte de Luxembourg Adalbero de Luxembourg - who was killed at Antioch in early 1098 Ermesinde de Luxembourg - who first married Albert II Graf von Dagsburg and secondly (in 1109) Godefroi Comte de Namur; who became the heiress to Luxembourg after the death of her nephew Conrad, following which Luxembourg passed into the Namur family though her son Henri IV Comte de Luxembourg [4] [5] Mathilde de Luxembourg - who married Gottfried von Metz, Graf im Bliesgau Other children have been reported but are considered less certain or uncertain: [1] Conrad Rudolph Odilia First Marriage and Family Ermesinde's first marriage was to Albert II Graf von Dagsburg, as his second wife. Her husband died on 24 Aug 1098. [1] [6] Ermesinde de Luxembourg and Albert von Dagsburg are believed to have had two children together: [6] Mechtild de Dagsburg - who later married Folmar VIII Graf von Metz a second daughter Albert von Dagsburg died on 24 Aug 1098. [1] [6] Second Marriage and Family Ermesinde remarried in 1109, to Godefroi Comte de Namur, as his second wife - becoming Comtesse de Namur. [1] [4] [7] Ermesinde de Luxembourg and Godefroi de Namur had five children together: [4] [7] Albert de Namur Henri de Namur Clementia (Clemence) de Namur Beatrix de Namur Adelaide (Adelis / Aledis / Alix) de Namur Successions Following the death of her nephew Conrad II Comte de Luxembourg without heirs in 1136, Ermesinde inherited the county of Luxembourg, but effectively abdicated in favor of her son Henri, who then succeeded his cousin as Henri IV Comte de Luxembourg. [1] [4] [5] [7] Her husband Godefroi Comte de Namur died on 19 Aug 1139 and was succeeded by their son Henri IV Comte de Luxembourg who then also became Henri II Comte de Namur. [4] [7] Like many members of the European nobility, Ermesinde regularly made donations to churches and monasteries. Ermesinde is considered to have died on or about 26 Jun 1141 although the primary source reflecting her burial has not been identified. [1] [4] [8] Research Notes Note regarding wives of Conrad Some genealogies have suggested that Mathilde was a daughter of Conrad's second wife Clementia - and some have effectively blended the earlier references to Ermesinde and the later referencs to Clementia into a single person, often then referred to as Clemence de Poitou or Clementia of Aquitaine. However, there is no clear evidence to show that these were the same person - and early records associate Mathilde with Conrad's first wife Ermesinde de Poitou, as well as later with Clementia (who would by then have become the Comtesse de Luxembourg). [1] See research note regarding the wives of Conrad on his profile page: Note regarding wives of Conrad Note regarding children of Conrad Regarding several of Conrad's reported children, certain of the references that have influenced genealogies are considered suspect, as reviewed in Cawley FMG. Conrad, Rudolph and Odilia are characterized accordingly. [1] The five children referenced in the top list above are reflected in records - but their order as reflected in Cawley FMG is not entirely consistent. A principal source related to Guillaume and Ermesinde (both of whom were later heirs), apparently indicates that both they and their sister Mathilde were children of Count Conrad of Luxembourg and his wife first wife Ermesinde. Cawley's basis for potentially "correcting" their parentage is a later charter in which Conrad's second wife Clementia, as countess, makes reference to the consent of Ermesinde and Guillaume, but her step-children might well have been referenced as her children. Furthermore, Cawley's chronology is difficult with respect to Clementia being the mother of Mathilde (leading to his conclusion that she must instead have been a daughter of the first marriage). There is also the actual inheritance of the estate reflected in Conrad's succession - which went from Conrad's eldest son Henri to his son Guillaume, and then from Guillaume to Guillaume's son Conrad, and finally from Conrad to his aunt Ermesinde - in connection with which Luxembourg passed into the Namur family.[1] [4] If as the cited reference apparently reflected, both Guillaume and Ermesinde were children of the first marriage, and the later reference was simply referencing their consent in their capacity as step-children of the then-current countess Clementia (particularly since they were in fact in a position to become Conrad's heirs and did in fact become his heirs), then none of these would be inconsistencies requiring a proposed "correction" or suggestions of unusual inheritance patterns (as posited by Cawley). Finally, while the children may have been referenced in association with their step-mother in connection with subsequent consents, the opposite is not true. That is, if they were actually the biological children of Conrad's second wife and not his first, then they would not be referenced in connection with his first wife Ermesinde. In fact, the primary reference from 1232 reflecting an account regarding the year 1168 not only associates them with Ermesinde but it uses the more distinctive term of peperit (third person singular perfect of pario: she gave birth to): [9] Quadeam autem nobilis Comitissa de Longuy Ermonsendis nomine peperit Comitem Guillelmum de Lucemburc patrem Conrardi, & Ermensendem Comitissam Namurcensem uxorem Comitis Godefredi, & Mathildam Comitissam de Longuy & de Homberc, & de Castris. Regarding the passage of Luxembourg through Ermesinde as heir to the Namur family, it is reflected in both the original Chronicle by Alberic quoted above (Ermensendem Comitissam Namurcensem uxorem Comitis Godefredi being the daughter and "progeny" of Comitissa de Longuy Ermonsendis) [9] - and also in the subsequent records reflected in Cawley FMG related to the house of Luxembourg - Namur. [4] [5] Sources ↑ 1.00 1.01 1.02 1.03 1.04 1.05 1.06 1.07 1.08 1.09 1.10 1.11 1.12 1.13 Comtes de Luxembourg 963-1136 by Cawley, Charles. Medieval Lands: A prosopography of medieval European noble and royal families. Published by Charles Cawley and the Foundation for Medieval Genealogy (FMG) 2006-2021, including source citations and relevant texts; hosted online by FMG, accessed 2024; see also WikiTree's source page for MedLands) ↑ Brandenburg, Erich: Die Nachkommen Karls des Großen, Verlag Degener & Co, Neustadt an der Aisch 1998, Tafel 12, Seite 24, quoted in: Manfred Hiebl, Genealogie Mittelalter, Ermesinde I., Gräfin von Luxemburg ↑ Gades, John A. (Brill Archive, 1951) Luxemburg in the Middle Ages. Cf. pp. 55-58. Available via Google Books: Luxemburg in the Middle Ages ↑ 4.0 4.1 4.2 4.3 4.4 4.5 4.6 4.7 Comtes de Namur 907-1190 - Godefroi de Namur by Cawley, Charles. Medieval Lands: A prosopography of medieval European noble and royal families. Published by Charles Cawley and the Foundation for Medieval Genealogy (FMG) 2006-2021, including source citations and relevant texts; hosted online by FMG, accessed 2024; see also WikiTree's source page for MedLands) ↑ 5.0 5.1 5.2 Comtes de Luxembourg 1136-1247 (Namur) by Cawley, Charles. Medieval Lands: A prosopography of medieval European noble and royal families. Published by Charles Cawley and the Foundation for Medieval Genealogy (FMG) 2006-2021, including source citations and relevant texts; hosted online by FMG, accessed 2024; see also WikiTree's source page for MedLands) ↑ 6.0 6.1 6.2 Grafen von Egisheim und Dagsburg (Moha) by Cawley, Charles. Medieval Lands: A prosopography of medieval European noble and royal families. Published by Charles Cawley and the Foundation for Medieval Genealogy (FMG) 2006-2021, including source citations and relevant texts; hosted online by FMG, accessed 2024; see also WikiTree's source page for MedLands) ↑ 7.0 7.1 7.2 7.3 Rouseau, Félix (Conservateur aux Archives du Royaume). Actes des Comtes de Namur de la Première Race (946-1196) (1936, Marcel, Hayez, Imprimeur de l'Académie Royale de Belgique); disponible via Commission Royale d'Histoire de la Belgique Actes des Comtes de Namur (946-1196) - Godefroid, XCVII - CXII ↑ Wikipedia - Ermesinde of Luxembourg, Countess of Namur ↑ 9.0 9.1 Alberici monachi Trium fontium Chronicon, è manuscriptis nunc primum editum à Godofredo Guilielmo Leibnitio; available online via Internet Archive, Alberici monachi Trium fontium Chronicon (cf. page 350, image 644 of 884)
  Person ID	I59526	Freeman-Smith
  Last Modified	27 Jan 2026

  
  

  Father	LUXEMBOURG Conrad,   b. 1040, Luxemburg, Upper Lotharingia, Holy Roman Empire d. 08 Aug 1086, Palestine (Age 46 years)
  Relationship	natural
  Mother	POITOU Ermesinde,   b. Abt 1040, Poitou, Duché d'Aquitaine, France
  Relationship	natural
  Family ID	F26435	Group Sheet  |  Family Chart

  
  

  Family	NAMUR Godefroi,   b. Abt 1070, Comté de Namur, Lower Lotharingia, Holy Roman Empire d. 19 Aug 1139 (Age 69 years)
  Children	1. NAMUR Henri,   b. Abt 1111, Comté de Namur, Lower Lotharingia, Holy Roman Empire d. 14 Aug 1196, Comté de Luxembourg, Upper Lotharingia, Holy Roman Empire (Age 85 years)  [Father: natural]  [Mother: natural]   2. NAMUR Beatrix,   b. 1114, Namur, Belgium d. Abt 1160 (Age 46 years)  [Father: natural]  [Mother: natural]
  Family ID	F26468	Group Sheet  |  Family Chart
  Last Modified	27 Jan 2026