Chris & Julie Petersen's Genealogy

Eustache I à l'Oeil

Male Abt 995 - Abt 1049  (54 years)

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  • Name Eustache I à l'Oeil
    Birth Abt 995  , , France Find all individuals with events at this location 
    Gender Male
    Death Abt 1049 
    Person ID I6110  Petersen-de Lanskoy
    Last Modified 21 Jun 2026

    Father Baldwin
    Mother Adelvie de Gant
    Family ID F2697  Group Sheet  |  Family Chart

    Family Mathilde or Mahaut de Louvain
    Children 
     1. Eustache II
     2. Lambert of Boulogne   d. 1054, Phalempin, Nord, Nord-Pas-de-Calais, France Find all individuals with events at this location
     3. Godfrey or Geoffrey of Boulogne
     4. Gerberge
    Family ID F2692  Group Sheet  |  Family Chart
    Last Modified 30 Jun 2026

  • Notes 
    • RESEARCH_NOTES:
      1. “Royal Ancestry: A Study in Colonial & Medieval Families,” Douglas Richardson (2013):
      “EUSTACHE I a l'Oeil, Count of Boulogne, son and heir of Baldwin, Count of Boulogne, by his wife, Adelvie de Gant, born about 995. He married MATHILDE (or MAHAUT) OF LOUVAIN, daughter of Lambert I, Count of Louvain, by Gerberge, daughter of Charles, Duke of Lower Lorraine. She was born about 993. They had three sons, Eustache (II) [Count of Boulogne], Lambert [Count of Lens], and Godfrey (or Geoffrey) [Bishop of Paris, Arch-Chancellor of France], and one daughter, Gerberge (wife of Friedrich II, Duke of Lower Lorraine). EUSTACHE I, Count of Boulogne, died about 1049.
      L'Art de Vérifier les Dates 2 (1784): 760-767 (sub Comtes de Boulogne). Delisle Recueil des Historiens des Gaules et de la France 11 (1876): 205-206 (Ex Genealogia de qua ortis est Carolus Magnus), 346 (Ex Genealogia Comitum Bononiensium), 370 (Ex Genealogia B. Arnulphi Metensis Episcopi); 374 (Genealogix ex Chronicis Hainoniensibus); 13 (1869): 585 (Ex Genealogia Caroli Magni qua Namurcensium Comitum et Boloniens), 647-648 (Ex Genealogia B. Amulphi). Monumenta Germaniae Historica 9 (1925): 300-301; 14 (1925): 621. Sellers De Carpentier Allied Ancestry (1928): 185-187. Brandenburg Die Nachkommen Karls des Großen (1935): IX 69. Schwennicke Europäische Stammtafeln 1 (1980): 95 (sub Hainault, Brabant); 3(4) (1989): 621 (sub Boulogne). Winter Descs. of Charlemagne (800-1400) (1987): IX.69, XI.461j, X.124-X.127.
      Children of Eustache I of Boulogne, by Mathilde of Louvain:
      i. EUSTACHE II, Count of Boulogne [see below].
      ii. LAMBERT OF BOULOGNE, Count of Lens, married ALICE OF NORMANDY, Countess of Aumale [see AUMALE 1].”

      2. “Royal Ancestry: A Study in Colonial & Medieval Families,” Douglas Richardson (2013):
      “ALICE (AELIDIS, ADELIZA, ADELISA, ADELIDIS) OF NORMANDY, illegitimate daughter of Robert, Duke of Normandy, possibly by his mistress, Arlette (or Harleve) [see Appendix, Line A, Gen. 11 for her ancestry], born before 1035. She was the sister of William the Conqueror, King of England [see ENGLAND 1]. She married (1st) ENGUERRAND II, Count of Ponthieu, son and heir of Hugues II, Count of Ponthieu and Montreuil, seigneur of Abbeville, by Berthe, daughter of Guerinfrid, seigneur of Aurnale. They had one daughter, Alice. He was slain before the Chateau d'Arques 25 October 1053. His widow, Alice, married (2nd) 1053/4 LAMBERT OF BOULOGNE, Count of Lens, Governor of Lille Castle, younger son of Eustache I, Count of Boulogne, by Mathilde (or Mahaut), daughter of Lambert I, Count of Louvain [see BOULOGNE 1 for his ancestry]. They had one daughter, Judith. In 1047 he and his brother, Count Eustache, and Count Baldwin V of Flanders were in attendance at the court of King Henry III of Germany, where they witnessed Henry's confirmation of a gift to St. Medard. LAMBERT OF BOULOGNE, Count of Lens, was slain in battle at Phalempin in 1054. His widow, Alice, married (3rd) in 1060 EUDES III, Count of Champagne, Banner-bearer to the Archbishops of Rouen, son and heir of Etienne, Count of Troyes and Meaux, by his wife, Adelaide. They had one son, Stephen (or Etienne) [Count of Aumale]. In the period, 1047-55, he witnessed an agreement between Rahier, husband of Arembourg, and the canons of Saint-Maurice of Angers, by which the canons temporarily relinquished certain rights in the church of Joué. At the death of his father about 1047 or 1048, he was deprived of the county of Champagne by his uncle, Thibaut III, and took refuge with William, Duke of Normandy [afterwards William the Conqueror, King of England]. William gave him his sister, Alice, in marriage. After the conquest of England in 1066, in which Eudes rendered good service, King William granted him the lordship of Holderness in England. William also erected the territory of Aumale into a county, which lands had been given to Eudes by Jean de Bayeux, Archbishop of Rouen. In 1082 William I, King of England, gave the Abbey of Holy Trinity at Caen the bourg of Le Homme with its revenues, with a reservation in favor of his sister, Alice, Countess of Aumale, of the tenancy during her life. His wife, Alice, Countess of Aumale, was living in 1086, and died before 1096 (date of charter). Sometime in the period, 1087-1095, Eudes witnessed a charter of King William Rufus, confirming to the Abbey of Saint Pierre au Mont Blandin in Gand certain possessions in his kingdom. Following the death of King William the Conqueror in 1087, he supported William Rufus as king in opposition to Robert, Duke of Normandy. In 1095 he joined the rebellion of Robert de Mowbray against King William Rufus, for which he was imprisoned by William and continued in confinement the remainder of his life. Eudes, Count of Champagne, died in prison sometime between Jan. 1096 and 2 August 1107.
      Du Plessis Histoire de l'Eglise de Meaux 2 (1731): 8 (charter dated 1061 of Count Thibaut; charter names his son, Henri, his nephew, Eudes (son of his brother), his wife, Adelade, and his sister Bertha, Countess of Brittany). Frost Notices rel. to the Early Hist. of the Town & Port of Hull (1827): 8-10. Bulkeley La Hougue Bie de Hambie 1 (1837): 153-159 ("A charter of grant to the Abbey of St. Trinity at Caen runs as follows: William, King, and Matilda my wife, Queen, give to the aforesaid Church the Bourg of Hulme ... and the Countess Adelisa de Albemarle conceding ..."). Coll. Top. et Gen. 6 (1840): 261-265. Bull de l’Académie Royale des Sciences 9(1) (1842): 264-265 (charter of King William Rufus of England dated 1087-1100, witnessed by Eudes, Count of Champagne [“Odonis comitis de Campania”]; also see Chartes & Docs. de l'Abbaye de Saint Pierre au Mont Blandin à Gand (1868): 106-107. Le Glay Histoire des Comtes de Flandres jusqu' à l'avènement de la maison de Bourgogne 1 (1843): 168 ("Ce lieu, appelé Buc, où existait de très-ancienne date un château qui passe pour avoir été le siège de la domination du premier forestier de Flandre, et qui par la suite a vu s'élever, sous le nom de Lille, une cite si florissante, ce lieu servait de refuge à la personne du marquis et à celle de ses fils. Il avait été fortifié de nouveau, et la plupart des barons flamands s'y étaient enfermés avec leur suzerain. Il ne semble pas que l'empereur se soit rendu maître de cette importante forteresse. Avant qu'il en eût tenté le siège, le gouverneur Lambert, comte de Lens et oncle du fameux Godefroi du Bouillon, sortit à sa rencontre avec des troupes numbreuses. Cette opposition inattendue, en opérant une diversion, aura empêché l'empereur d'attaquer le château de Lille; mais elle coûta la vie au comte Lambert. De là Henri marcha vers Toumai et assiègea le fort de cette ville, où s'étaient refugiés grand nombre de gens: car tout le pays se dépeuplait sur le passage des impériaux."). Biog. Dict. of the Society for the Diffusion of Useful Knowledge 4 (1844): 179 (biog. of Eudes of Odo, Count of Aumale). Stapleton Magni Rotuli Scaccarii Nomanniae 2 (1844): xxix-xxxi ("In the Observations on the History of Adeliza, sister of William the Conqueror (Archaeologia, vol. XXVI, p. 349), an inference has been drawn from the terms of a contemporaneous charter in proof that the Comtesse of Aumale, wife of Count Odo of Champagne, was the niece and not the sister of King William the Conqueror. The supposition is, however, erroneous, as is shewn by another subsequent charter to the collegiate church of Auchy, written by commond of Adelidis the most noble Comtesse, sister, to wit, of William King of the English, confirmante viro suo, videlicet, Odone comite una cum filio suo Stephano."). Semichon Histoire de la Ville d'Aumale 1 (1862). Bond Chronica Monasterii de Melsal (Rolls Set.) (1866): 89 (De genealogia nobelium oomitum Albemarliz, fundatorum nostrorum: "Comes quondam Campanix, nepos regis Francorum, habebat quendam filium, militem egregrium, nomine Odonem Porro, coadjuvante dictum Odonem archiepiscopo Rothomagensi erga ipsum regem Willielmum, dedit ei prmfatus rex sororem suam in uxorem."). Delisle Chronique de Robert de Torigni 1 (1872): 34 (sub A.D. 1026: "Hic tercius Ricardus eodem primo anno ducatus sui mortuus est, et successit ei Robertus frater ejus, qui genuit Willermum de Herleva non sponsata, qui postea Angliam conquisivit, et unarn filiam nomine Aeliz de alia concubina."). Planche Conqueror & His Companions 1 (1874): 118-126. Recueil des Historiens des Gaules et de la France 11 (1876): 126 (Ex Chronico Cameracensi et Atrebatensi: Year: 1054. Que facto, accinxit se rursum Iohannes ad deducendi negotium, volens, si fled posset aliquo pacto, per clausulam illam ducere Imperatoris exercitum. Laboranti igitur homini et quxrenti id ipsum perficere, portx clausulx illius apertx aunt de media nocte; sicque clausulam illam introivit Imperator, facta inimicorum suorum resistere volentium non minima Pertransiens autem clausulam illam, et interfectis a dextris et a sinistris occursantibus sibi, ad Islense castellum pervenit, ubi Lantbertus Comes Lensensis cum multis ei occurens, interfectus occubuit. Ab eo quidem castello divertit ad Tornacum civitatem; ubi in quodam municipio inclusit non parvam militum electorum fugientem multitudinem, quos obsidione et ad ultimum fame oppressos compulit ad deditionem. Illis igitus acceptis, et per ergastula militum suorum in custodia reclusis, Imperator cum gloria ad civitates regni sui rediit."), 205-206 (Ex Genealogia de qua ortus est Carolus Magnus dated after 1135: "Carolus Dux frater Lotharii genuit Ermengardem et Gerbergam. Ermengardis genuit Albertum Comitem de Namuren. Albertus genuit Albertum qui none est. Et Gerberga soror Ermengardis genuit Henricom Seniorem de Brusella. Henricus Senior genuit Comitem Lambertum, et Henricum fratrem ejus, et Matildem sororem comm. Hanc Matildem duxit uxorem Comes Eustachius de Bulonia, et genuit ex ea duos filios Eustachium et Lambertum. Eustachius accepit uxorem filium Godefridi Ducis, Idam nomine, nobilem genere et moribus; et genuit ex ea quatuor filios, Guillermum, Godefridum, qui nunc est Dux Lotharingix, Balduinum, et rani; Eustachium. Godefridus vero et Balduinus fuerent Reges Jerosolvmorum. Eustachius vero genuit filiam, nomine Matildem, quam postea duxit in uxorem Stephanus Rex Anglorum."), 374 (Genealogiæ ex Chronicis Hainoniensibus. "Carolus Dux Lotharingix, frater Lotharii Regis Francorum, duas habuit filias Ermengardem et Gerbergam: de Ermengarde natus est Albertus Comes Namurcensis, qui genuit Albertum ei succedentem, et Henricum Comitem de Durbio. Albertus II genuit Godefridum Comitem Namurcensium, et Henricum Comitem de Rupe. Hic Henricus filiam habuit Macthildem, quæ domino de Walecourt peperit Werricum et Beatricem, etc. & Godefridus Comes Namurcensis, frater Henrici de Rupe, genuit Henricum et Adelidem uxorem Hainonensis Balduini, cui peperit Balduinum Comitem, etc. Gerberga vero alia filia Caroli, fratris Lotharii, peperit Henricum Seniorem de Bruxella; et hic Henricus genuit Henricum, Lambertum, et Macthildem qux Comiti de Bolonia Eustachio peperit Eustachium et Lambertum. Eustachius vero ex Ida filia Godefridi Ducis Lotharingix genuit Godefridum de Bullonio, postea Regem Hierusalem, et Eustachium, etc."), 582-583 (confirmation charter of King Henry III of Germany dated 1047). Recueil des Historiens des Gaules et de la France 12 (1877): 583 (Ex Willelmi Calculi Gemeticensis Monachi: `Waldevi Comitis Huntedonix, Habuit autem idem Waldevus tres filias ex uxore sua [Juditha] filia [Adelaidis] Comitiss de Albamarla, quæ Comitissa fuit soror uterina Willehni Regis Anglorum senioris."). Recueil des Historiens des Gauleses et de la France 13 (1869): 585 (Ex Genealogia Caroli Magni qua Namurcensium Comitum et Boloniens. Origo Declaratur. "Carolus Dux, frater Lotharii Regis, genuit Ermengardem et Gerbergam. Ermengardis genuit Albertum Comitem de Namurco, etc. Albertus genuit Albertum et fratrem ejus Henricum Comitem de Durbuio. Albertus autem de Namurco genuit Godefridum, et Henricum Comitem de Rupe, pattern Mathildis qux genuit Jacobum Avesnensem Godefridus autem frater ejus genuit Henricum Comitem Narnurcensem, qui caruit liberis, et sororem ejus Alithiarn: quæ nupta Hainoensi Comiti Balduino genuit Balduinum, qui duxit Margaretam filiam Theoderici Flandrensis Comitis, et genuit filium æquivocum sibi. Gerberga vero soror Ermengardis genuit Henricum seniorem de Brussella. Henricus senior genuit Lambertum et Henricum fratrem ejus, et Mathildem sororem eorum. Hanc Mathildem duxit uxorem Comes Eustachius de Bolonia, et genuit ex ea duos filios Eustachium et Lambertum. Eustachius vero accepit uxorem filiam Godefridi [Lotharingiæ] Ducis, Idam nominee, nobilem genere et moribus, et genuit ex ea tres filios, Eustachium, Godefridum et Balduinum. Eustachius frater Balduini Regis Jerusalem duxit Mariam filiam Regis Scotiæ, et genuit Mathildem. Mathildis nupta Stephano, fiolio Stephani Blesensis Comitis, genuit Mariam Abbatissam [Ramesiæ]. Cumque defecissent in Bolonia legitimi hæredes, Matthus filius Theoderici Comitis Flandrensis, licit illicite, duxit Abbatissam, et suscitavit semem hæreditarium duas filias generando, et remisit earn ad locum suum."). Laffleur de Kermaingant Cartulaire de l'Abbege de Saint-Michel du Tréport (1880): 8-20 (confirmation of gifts to Tréport Abbey includes the following: "Henricus Visa dedit, pro sua et antecessorum suorem anima, ecdesie Sancti Michaelis de Ulterisportu medietatem vile que vocatur Frastineta [Le Fresnoy], et medietatum bosci ejusdem, et ecclesiam Sancti Nicholai quam in eadem construxerat villa, et hoc fecit concessu Berthe uxoris sue et filii sui Willelmi, et concessu comitisse Albemarle Aelidis, ac filii ejus Stephani."). Doyle Official Baronage of England 2 (1886): 201 (sub Holderness). Remarks & Colls. of Thomas Hearne 3 (Oxford Hist. Soc.) (1889): 104 (ped. chart). Recueil des Historiens des Gaules et de la France 23 (1894): 580 (Notæ Monasterii Montis Sancti Michaelis: "12 Sept. [Obiit] Lanbertus comes."). Notes & Queries 9th Ser. 8 (1901): 525-526. Urseau Cartulaire Moir de la Cathédrale d'Angers (1908): 98-99 (agreement dated 1047-55 witnessed by "young Eudes, nephew of Count Thibaut" [Odo puer, nepos comitis Tethberti”). C.P. 1 (1910): 351-352 (sub Aumale). Clay Extinct & Dormant Peerages (1913): 1 (sub Earls of Albemarle). Farrer Early Yorkshire Charters 3 (1916): 30-33 (charter of Stephen, Count of Aumale, dated 1115 confirms the gift made by Alice his mother ["mater mea Adeliza] to the monks of St. Lucian of Beauvais of the church of St. Martin D'Acy, which his ancestors had erected outside the castle of Aumale; charter also mentions Stephen's uncle, William I, King of England ['Willelmi regis Anglorum avunculi men). Monumenta Germaniae Histotica SS 7 (1925): 494 (Gesta Episcoporum Cameracensium. Continuatio); SS 9 (1925): 300-301 (Haec est Genealogia Regis Karoli qui vocatus est magnus, de cuius prosapia ortus est rex Godefridus Eisque frater rex Balduinus: "Karolus Magnus genuit Ludovicum Pissimum augustum. Ludovicus genuit Lotharium Pipinum et Ludovicum ex Ermengarde, et Karolum Calvum ex Iudith. Karolus Calvus genuit Ludovicum, de quo dictum est qui nichil fecit, quia post mortem paths duobus tantum annis vixit. Ludovicus filius Karoli genuit Karolum Simplicem et Karlemannum. Karolus vero Simplex ab Heriberto captus est. Qui Karolus ex Ogiva genuit Ludovicum. Ludovicus genuit Lotharium regem et Karolum ducem ex Gerberga. Lotharius rex genuit Ludovicum iuvenem, et Karolus dux, frater Lotharii regis, genuit Ermengardem et Gerbergam. Ermengardis genuit Albertum comitem de Namuco. Albertus genuit Albertum qui nunc est, et fratrem eius Henricum comitem de Durboio. Gerberga vero soror Ermengardis genuit Henricum seniorem de Bursella. Henricus senior genuit Lambertum comitem et Henricum fratrem eius et Mathildem sororem comm. Hanc Mathildem duxit uxorem comes Eustachius de Bolonia, et genuit ex ea duos filios, Eustachium et Lantbertum. Eustachius vero accepit uxorem filiam Godefridi duels, Idam nomine, nobilem genere et mobus, et genuit ex ea tres filios, Eustachium et Godefridum qui nunc est dux Lotharingiae et Balduiniun." Later addition: "Eustachius, frater Balduini regis Iherusalem, duxit Mariam filiam regis Scotiae, et genuit Mathildem. Mathildis nupta Stephatio, filio Stephani Blesensis comitis, genuit Mariam abbatissam. Curnque defecissent in Bolonia legitimi heredes, Matheus filius Theoderici comitis Flandrensis, licet illicite, duxit abbatissam, et suscitavit semen hereditatium duas filias generando, et rernisit earn ad locurn suum. Albertus autem de Namurco genuit Godefridum et Henricurn comitem de Rupe, patrem Mathildis quae genuit Iacobum Avesnensem. Godefridus autem frater emus Henricum cornitem Namurcensem, qui caruit liberis et sororem eius Althiam, quae nupta Hainoensi comiti Balduino, genuit Balduinum, qui duxit Margaretam filia Theoderici Flandrensis comitis, et genuit filium equivocum sibi."). Winter Descs. of Charlemagne (800-1400) (1987): X.126, XI.227, XII.19. Schwennicke Europäische Stammtafeln 2 (1984): 79 (sub Normandy); 3(4) (1989): 621 (sub Boulogne). Winter Descs. of Charlemagne (800-1400) (1987): X.126, XI.227. English Lords of Holderness, 1086-1260 (1979). Keats-Rohan Domesday People: Prosopography of Persons occurring in English Docs., 1066-1166 1 (1999): 124. Burgess Hist. of the Norman People: Ware's Roman de Rou (2004): 1. Tanner Fams., Friends, & Allies (2004): 290 (chart), 306 (Normandy ped.).
      Child of Alice of Normandy, by Lambert, Count of Lens:
      i. JUDITH OF LENS, married WALTHEOF, Earl of Northumberland [see BEAUCHAMP 2].
      Child of Alice of Normandy, by Eudes, Count of Champagne:
      i. STEPHEN (or ETIENNE), Count of Aumale [see next].”