Geoffrey I (Gauzfred I) (d. after 985),

Viscount of Châteaudun A viscount ( , for male) or viscountess (, for female) is a title used in certain European countries for a noble of varying status. In many countries a viscount, and its historical equivalents, was a non-hereditary, administrative or judicial ...

, possibly the son of Geoffroy, Viscount of Chartres. Geoffrey was appointed viscount by Theobald the Trickster, in his position of Count of Châteaudun. Geoffrey was the founder of the House of Châteaudun, which gave rise to both the

House of Ingelger The House of Ingelger (French: ''Ingelgeriens''), also known as The Ingelgerians, was the first dynasty in Anjou. It was founded by Ingelger (died 886), Viscount of Angers, whose son Fulk the Red made himself count of Anjou. By inheritance, the fami ...

and House of Plantagenets. It is believed, but unverified, that Geoffrey descended from Rorgon I, Count of Maine, and therefore part of the Rogonid/Rorgonid dynasty. Little is known about Geoffrey, other than he was closely associated with Hardouin,

Archbishop of Tours The Roman Catholic Archdiocese of Tours (Latin: ''Archidioecesis Turonensis''; French: ''Archidiocèse de Tours'') is an archdiocese of the Latin Rite of the Roman Catholic Church in France. The archdiocese has roots that go back to the 3rd centu ...

. Geoffrey married Ermengarde of an unknown family and had one child: * Hugues, Viscount of Châteaudun Geoffrey was succeeded by his son as Viscount of Châteaudun upon his death. There are differing accounts about Geoffrey and his offspring. One prominent theory is that Geoffrey and Hughes were the same person, and that Ermengarde was Geoffrey’s first wife, and Hildegard, the wife of Hughes, was his second.

Sources

Boussard, Jacques, ''L'origine des familles seigneuriales dans la région de la Loire moyenne'', Cahiers de Civilisation Médiévale 5, 1962 Phalle, Édouard de Saint, ''Comtes de Troyes et de Poitiers au IXe siècle: histoire d’un double échec''. In Christian Settipani and Katharine S. B. Keats-Rohan, ''Onomastique et Parenté dans l'Occident médiéva''l. 2000. Kerrebrouck, Patrick van., Nouvelle histoire généalogique de l'auguste maison de France, vol. 1: La Préhistoire des Capétiens. 1993. Tout, Thomas Frederick, ''The Empire and the Papacy: 918-1273, Periods of European History'', London: Rivingtons, 1928
Medieval Lands Project, Vicomtes de Châteaudun
{{DEFAULTSORT:Geoffrey I, Viscount of Chateaudun Medieval French nobility 10th-century French people Viscounts of Châteaudun