Eustache I, Comte de Boulogne1 
He gained the title of Comte de Boulogne.
Child of Eustache I, Comte de Boulogne
Children of Eustache I, Comte de Boulogne and Mathilde van Leuven
- Lambert II de Boulogne, Comte de Lens+4 d. 1054
- Eustache II, Comte de Boulogne+ b. bt 1015 – 1020, d. 1087
- Gerberge de Boulogne+1 b. 1025, d. 1049
- [S3268] Hans Harmsen, “re: Chester Family,” e-mail message to BENR, 21 August 2008. Hereinafter cited as “re: Chester Family.”
- [S37] BP2003 volume 2, page 2691. See link for full details for this source. Hereinafter cited as. [S37]
- [S37] BP2003. [S37]
- [S6] G.E. Cokayne; with Vicary Gibbs, H.A. Doubleday, Geoffrey H. White, Duncan Warrand and Lord Howard de Walden, editors, The Complete Peerage of England, Scotland, Ireland, Great Britain and the United Kingdom, Extant, Extinct or Dormant, new ed., 13 volumes in 14 (1910-1959; reprint in 6 volumes, Gloucester, U.K.: Alan Sutton Publishing, 2000), volume I, page 352. Hereinafter cited as The Complete Peerage.
Mathilde van Leuven1
Children of Mathilde van Leuven and Eustache I, Comte de Boulogne
- Lambert II de Boulogne, Comte de Lens+1 d. 1054
- Eustache II, Comte de Boulogne+2 b. bt 1015 – 1020, d. 1087
- Gerberge de Boulogne+3 b. 1025, d. 1049
- [S6] G.E. Cokayne; with Vicary Gibbs, H.A. Doubleday, Geoffrey H. White, Duncan Warrand and Lord Howard de Walden, editors, The Complete Peerage of England, Scotland, Ireland, Great Britain and the United Kingdom, Extant, Extinct or Dormant, new ed., 13 volumes in 14 (1910-1959; reprint in 6 volumes, Gloucester, U.K.: Alan Sutton Publishing, 2000), volume I, page 352. Hereinafter cited as The Complete Peerage.
- [S37] BP2003 volume 2, page 2691. See link for full details for this source. Hereinafter cited as. [S37]
- [S3268] Hans Harmsen, “re: Chester Family,” e-mail message to BENR, 21 August 2008. Hereinafter cited as “re: Chester Family.”
Baudouin II, Comte de Boulogne1 
He gained the title of Comte de Boulogne in 990.
Child of Baudouin II, Comte de Boulogne and Adeline van Hollant
- Eustache I, Comte de Boulogne+ b. 1000, d. c 1049
Adeline van Hollant 
Child of Adeline van Hollant and Baudouin II, Comte de Boulogne
- Eustache I, Comte de Boulogne+ b. 1000, d. c 1049
Arnulf ‘Gandensis’ Graaf in Hollant en West Friesland1 
He succeeded as the Graaf van Hollant in 988.1
Child of Arnulf ‘Gandensis’ Graaf in Hollant en West Friesland
- Adalbert Burggraaf van Gent+2 b. 970, d. 1030
Children of Arnulf ‘Gandensis’ Graaf in Hollant en West Friesland and Liutgarde von Luxemburg
- Dirk III Graaf van Hollant en West Friesland+1 b. 985, d. 27 May 1039
- Adeline van Hollant+ b. 987, d. 20 Nov 1052
- [S38] John Morby, Dynasties of the World: a chronological and genealogical handbook (Oxford, Oxfordshire, U.K.: Oxford University Press, 1989), page 91. Hereinafter cited as Dynasties of the World.
- [S3268] Hans Harmsen, “re: Chester Family,” e-mail message to BENR, 21 August 2008. Hereinafter cited as “re: Chester Family.”
Lambert I, Comte de Louvain1 
Lambert I, Comte de Louvain also went by the nick-name of Lambert ‘the Bearded’.1 He gained the title of Comte de Louvain.1 He fought in the Battle of Florennes on 12 September 1015.1
Children of Lambert I, Comte de Louvain and Gerberge de Basse-Lorraine
- Mathilde van Leuven+3
- Henri I, Comte de Louvain+1 d. 1038
- Reinier van Leuven+4
- Lambert II, Comte de Louvain+1 b. c 995, d. 19 Jun 1054
- [S37] BP2003 volume 2, page 2691. See link for full details for this source. Hereinafter cited as. [S37]
- [S3268] Hans Harmsen, “re: Chester Family,” e-mail message to BENR, 21 August 2008. Hereinafter cited as “re: Chester Family.”
- [S6] G.E. Cokayne; with Vicary Gibbs, H.A. Doubleday, Geoffrey H. White, Duncan Warrand and Lord Howard de Walden, editors, The Complete Peerage of England, Scotland, Ireland, Great Britain and the United Kingdom, Extant, Extinct or Dormant, new ed., 13 volumes in 14 (1910-1959; reprint in 6 volumes, Gloucester, U.K.: Alan Sutton Publishing, 2000), volume I, page 352. Hereinafter cited as The Complete Peerage.
- [S8569] Ranulph Fiennes, Agincourt, My family, the battle and the fight for France (London: Hodder & Stoughton, 2014). Hereinafter cited as Agincourt.
Gerberge de Basse-Lorraine 
Children of Gerberge de Basse-Lorraine and Lambert I, Comte de Louvain
- Mathilde van Leuven+
- Henri I, Comte de Louvain+2 d. 1038
- Reinier van Leuven+3
- Lambert II, Comte de Louvain+2 b. c 995, d. 19 Jun 1054
- [S3268] Hans Harmsen, “re: Chester Family,” e-mail message to BENR, 21 August 2008. Hereinafter cited as “re: Chester Family.”
- [S37] BP2003 volume 2, page 2691. See link for full details for this source. Hereinafter cited as. [S37]
- [S8569] Ranulph Fiennes, Agincourt, My family, the battle and the fight for France (London: Hodder & Stoughton, 2014). Hereinafter cited as Agincourt.
Charles, Duc de Basse-Lorraine 
He gained the title of Duc de Basse-Lorraine.
Children of Charles, Duc de Basse-Lorraine and Adelheid (?)
- Otto, Duc de Basse-Lorraine+1 b. 970, d. 1012
- Gerberge de Basse-Lorraine+ b. 975, d. 1018
Godefroi III Herzog von Niederlothringen1 
Godefroi III Herzog von Niederlothringen also went by the nick-name of Godefroi ‘le Barbu’ (or in English, ‘the Bearded.1‘) He succeeded as the Duc de Haute-Lorraine in 1044.1 He was deposed as Duke of Lorraine in 1047.3 He succeeded as the Duc de Basse-Lorraine in 1065.1
Child of Godefroi III Herzog von Niederlothringen
- Godefroi IV Herzog von Niederlothringen1 b. 1045, d. 26 Feb 1076
Child of Godefroi III Herzog von Niederlothringen and Beatrix de Haute-Lorraine
- Ida von Niederlothringen+1 b. 1034, d. 13 Nov 1113
- [S38] John Morby, Dynasties of the World: a chronological and genealogical handbook (Oxford, Oxfordshire, U.K.: Oxford University Press, 1989), page 93. Hereinafter cited as Dynasties of the World.
- [S3268] Hans Harmsen, “re: Chester Family,” e-mail message to BENR, 21 August 2008. Hereinafter cited as “re: Chester Family.”
- [S38] John Morby, Dynasties of the World, page 128.
Beatrix de Haute-Lorraine 
Child of Beatrix de Haute-Lorraine and Boniface III de Toscane, Marquis de Toscane
Child of Beatrix de Haute-Lorraine and Godefroi III Herzog von Niederlothringen
- Ida von Niederlothringen+ b. 1034, d. 13 Nov 1113