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Geoffroi I of Brittany
Abt 980 - 1008 (~ 28 years)
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Alain Fergant
Constance
Alan la Zouche
Ellen de Quincy
Eudes la Zouche
Milicent de Cantelowe
William la Zouche
Maud de Howbridge
Lorette la Zouche
Gilbert de Sanford
Alice la Zouche
William de Harcourt
Roger la Zouche
Margaret Biset
Alan la Zouche
Alice de Belmeis
Hawise Fergant
Geoffrey de Porhoët
Eleanor de Vitré
Geldouin de Dol
Mathilde de Mayenne
Andre II de Vitré
Marguerite de Sablé
Guillaume des Roches
Clémence de Mayenne
Robert IV de Sablé
Constance of Brittany
Geoffroi II de Mayenne
Constance of Brittany
Guy de Thouars
Conan IV
Margaret of Huntingdon
Bertha of Brittany
Alan III
Conan III of Brittany
Maud fitz Roy
Ermengarde of Anjou
Hawise of Rennes
Hoël II of Cornouaille
Alan III of Rennes
Bertha of Blois
Reynold I de Mohun
Alice de Briwere
William de Mohun
Lucy
William de Mohun
Godehilde de Tony
Agnes de Gant
William de Mohun
Roger de Mowbray
(Unknown) de Furnival
Maud de Beauchamp
William de Mowbray
Avice
Nele de Mowbray
Mabel
Alice de Gant
Roger de Mowbray
Robert de Welle
Isabel de Periton
William de Welle
Emma de Grainsby
Robert de Welle
Maud
(Unknown daughter of Walter de Gant)
William
Henry de Armenters
Alice
Juliane de Gant
Geoffrey de Armenters
Nichole de Gant
Peter de Mauley
Margaret de Gant
William de Kerdeston
Gilbert de Gant
Gilbert de Gant
Robert de Gant
Gunnor d'Aubeney
Alice Paynell
Maud of Brittany
Walter de Gant
Thomas de Clinton
Mazera de Bisege
Osbert de Clinton
Elysont
Osbert de Clinton
Margaret de Hatton
William de Tancarville
Tiphaine
Rabel de Tancarville
Raoul de Fougères
Isabel de Craon
Geoffroi de Fougères
Mathilde of Porhoët
Guillaume de Fougères
Agatha du Hommet
Raoul II de Fougères
Mathilde
Olive of Brittany
Henri de Fougères
Jean I
Blanche de Champagne
Yolande of Brittany
Hugh XI "le Brun" de Lusignan
Alix de Thouars
Pierre de Braine
Constance of Brittany
Guy de Thouars
Conan IV
Margaret of Huntingdon
Alan III
Bertha of Brittany
Stephen of Brittany
Hawise
Eudon of Brittany
Orguen
Avice de Lascelles
Thomas de Maunby
Robert de Lascelles
Emma
Roger de Lascelles
Beatrice
Theophania fitz Roald
Picot de Lascelles
Thomas de Burgh
Philip de Burgh
Maud de Morville
Thomas de Burgh
Sarah de Neville
Ismania
Philip de Burgh
Garsenia Musard
Roald fitz Harscod
(Unknown daughter of Eudon of Brittany)
Enisan Musard
Henry fitz Randolph
Randolph fitz Henry
Hervey fitz Hervey
Agatha of Ravensworth
Michael le Fleming
Ranulf fitz Henry
Alice de Staveley
Henry fitz Hervey
Alice Fitz Walter
Hervey fitz Akaris
Akaris fitz Bardolf
Bardolf
(Unknown mistress of Eudon of Brittany)
Parents
Conan I "Le Tort"
Ermengarde of Anjou
Geoffroi I of Brittany
Hawise of Normandy