Lothair I

Abt 795 - 855  (60 years)

• Name	Lothair I
  Birth	Abt 795
  Gender	Male
  Death	From 28 Sep 855 to 29 Sep 855	Prüm Monastery, Prüm, Bitburg-Prüm, Rhineland-Palatinate, Germany
  Person ID	I7419	Petersen-de Lanskoy
  Last Modified	21 Jun 2026

  
  

  Father	Louis I "the Pious",   b. From 16 Apr 778 to Sep 778, Chasseneuil-du-Poitou, Aquitaine, France d. 20 Jun 840, near Ingelheim am Rhein, Rhineland-Palatinate, Germany (Age 62 years)
  Mother	Ermengarde of Haspengau   d. 3 Oct 818
  Marriage	Abt 794
  Family ID	F3315	Group Sheet  |  Family Chart

  
  

  Family 1	Ermengarde of Tours   d. 20 Mar 851
  Marriage	Oct 821
  Children	1. Louis II   2. Lothair II,   b. Abt 835   d. 8 Aug 869, Piacenza, Emilia-Romagna, Italy (Age 34 years)   3. Charles   4. Helletrude   5. Bertha   6. of Italy   7. Gisèle   8. Rotrude
  Family ID	F3321	Group Sheet  |  Family Chart
  Last Modified	30 Jun 2026

  
  

  Family 2
  Children	1. Carlomann
  Family ID	F3322	Group Sheet  |  Family Chart
  Last Modified	30 Jun 2026

  
  

• Notes

  RESEARCH_NOTES: 1. “Royal Ancestry: A Study in Colonial & Medieval Families,” Douglas Richardson (2013): “LOTHAIR I, King of Bavaria, 814-817, King of Italy, 822-825, 829-840, Emperor, 833-834, 840-855 (joint emperor from 817), son and heir by his father's 1st marriage, born about 795. He married October 821 ERMENGARDE, daughter of Hugues, Count of Tours, by his wife, Ava. They had three sons, Louis (II) [King of Italy, Emperor], Lothair (II) [King of Lorraine], and Charles [King of Provence], and five daughters, Helletrude (or Hiltrude) (wife of Count Berenger), Bertha [Abbess of Avenay], ___ (wife of Giselbert, Count of Masau and Darnau), Gisele [Abbess of San Salvatore, Brescia], Rotnide (probable wife of Lambert II, Count of Nantes). By an unknown mistress, he also had one illegitimate son, Carlomann. His wife, Ermengarde, died 20 March 851. LOTHAIR I died at Priim monastery in Ardennes 28 (or 29) Sept. 855. Monumenta Germaniæ Historica SS XIII (1881): 219. (Annales Necrologici Prumienses [necrology of Prüm]: "Anno Domini incarn. 855. Lotharius imperator 3. Kal. Octob. feliciter obiit."). Monumenta Germaniæ Historica (Poetae Latini Aevu Carolini 2) (1884): 241 ("Epitaphium Hludharii Imperatoris: Continet hic tumulus memorandi Caesaris ossa / Hlotharii magni, principis atque pii. / Qui Francis, Italis, Romanis praefuit ipsis, Omnia sed sprevit, pauper et hinc abiit. / Nam bis tricenos monachus sic attigit annos, / Et se mutavit, ac bene post obiit. / III. Cal. Octob."). Monumenta Germaniæ Historica, Scriptores 13 (1881): 232 (Annales Lobienses: sub A.D. 855: "Lotharius imperator, qui mutato habitu Prumiae monachus factus fuerat, obiit 3. Kal. Octob.; cui aequivocus filius suus Lotharius successerat, qui eo anno Tiethbergam, sororem Hucberti abbatis, duxit uxorem."). Waitz Monumenta Germaniæ Historica, Scriptores rerum Germanicarum (in separate editions) 5 (1883): 45 (Annales Bertiniani sub AD. 855: "Lotharius imperator, morbo correptus vitamque desperans, monasterium Proneae in Arduenna constitutum adiit, seculoque et regno penitus abrenuncians, tonsus est, vitam habitumque monachi humiliter sumens. Dispositoque inter filios, qui secum morabantur, regno, ita ut Lotharius cognomen eius Frandam, Karlus vero Provinciam optinerent, intra sex dies vita decessit quarto Kalendarum Octobrium, atque in eodem monasterio sepulturam, ut desideraverat, consecutus est."). Monumenta Germaniæ Historica, Scriptores 13 (1891) 46 (Annales Fuldenses sub AD. 855: "Hlutharius imperator renuntians omnibus, quae habuit, Prumiense monasterium ingressus effectusque ibi monachaus III. Kal. Octobr. mortalem hominem exuit et ad vitam perrexit aeternam."). Birch Cat. Seals in the British Museum 5 (1898): 112 (seal of Lothair I dated AD. 843 - Oval: impression of an antique oval intaglio gem. Bust in profile to the right, crowned with laurel. Perhaps a portrait of Caracalla or Alexander Severus. Legend: + XPE ADIVVA HLOTHARIVM AV[G].). Parisot Royaume de Lorraine sous les Carolingiens (1899). Halphen Recueil d'Annales Angevines et Vendômoises (1903): 53 (Annales de Vendôme sub AD. 855: "Hlothanus rex moritur, prius factus monachus in monasterio Promie oh peccatum persecutionis paterne."). Brandenburg Die Nachkommen Karls des Großen (1935) III 8. Schwennicke Europäische Stammtafeln 1 (1980): 2 (Die Karolinger). Winter Descs. of Charlemagne (800-1400) (1987): III.9, IV.8-IV.15.” 2. “Royal Ancestry: A Study in Colonial & Medieval Families,” Douglas Richardson (2013): “LOUIS the Pious, King of Aquitaine, 781-813, Joint emperor, Emperor, 813-814, 834-840, legitimate son, born at Chasseneuil-du-Poitou in Aquitaine in 778, between 16 April and September. He married (1st) about 794 ERMENGARDE OF HASPENGAU, daughter of Ingram, Count of Haspengau. They had Lothair (I) [King of Bavaria, joint Emperor, Emperor], Pépin (or Pippin) (I) [King of Aquitaine], and Ludwig (II) [King of Bavaria, King of the Eastern Franks], and two daughters, Rotrude and Hildegarde. His wife, Ermengarde, died 3 October 818. He married (2nd) in February 819 JUDITH, daughter of Welf I, Count of Altorf, by his wife, Eigilwi (or Heilwich). She was born about 805. They had one son, Charles the Bald [King of the Western Franks, Emperor], and one daughter, Gisela (wife of Eberhard, Margrave of Friuli). By an unknown mistress, he also had one illegitimate son, Arnulf. LOUIS the Pious (or LUDWIG der Fromme) died on an island in the Rhine near Ingelheim 20 June 840, and was buried in the church of the abbey of Saint Arnoul at Metz. His widow, Judith, died at Tours 19 April 843. Viollet Prières et Fragments religieux (1870): 47-63. Monumenta Germaniæ Historica SS XIII (1881): 219. (Annales Necrologici Prumienses [necrology of Prüm]: "Anno 840. Ludvicus imperator 12 Kal. Iulii diem obiit."). Monumenta Germaniæ Historica (Necrologia Germaniæ 1) (1888): 275 (Necrologium Augiæ Divitis: "XIII kal. May [19 April] - Judit regina"), 277 (Necrologium Augiæ Divitis: "XI kal. July [21 June] - Hludowicus imperator augustus") Birch Cat. Seals in the British Museum 5 (1898): 112 (seal of Emperor Louis I dated A.D. 816 - Oval: a bust, in profile to the right, crowned with laurel. Legend: + XPE PROTEGE HLVDOVVICVM IMPERATORE.), 112 (undated seal of Emperor Louis I - Oval: bust in profile to the right, crowned with laurel. The drapery fastened on the right shoulder with a button. Legend: + XPE PROTEGE HLVDOVVICVM IMPERATORE.). Halphen Recueil d'Annales Angevines et Vendômoises (1903): 53 (Annales de Vendôme sub A.D 840: "Hludowicus imperator moritur."). Brandenburg Die Nachkommen Karls des Großen (1935) II 6. Schwennicke Europäische Stammtafeln 1 (1980): 2 (sub Die Karolinger); 3(4) (1989): 736 (sub Welfen). Winter Descs. of Charlemagne (800-1400) (1987): II.5, III.9-III.15. Settipani & von Kerrebrouck La Préhistoire des Capetians (1993). Children of Louis I (or Ludwig I), by Ermengarde of Haspengau: i. LOTHAIR, King of Bavaria, King of Italy, Emperor, married ERMENGARDE OF TOURS [see Line C, Gen. 3]. Children of Louis I (or Ludwig I), by Judith of Altorf: i. CHARLES II the Bald, King of Neustria, King of the West Franks, King of Italy, Emperor [see next]. ii. GISELA, married EBERHARD, Margrave of Friuli [see Line D, Gen. 3 below].”