Gerard I, Count of Guelders

Gerard I of Guelders (c. 1060 – 8 March 1129) was Count of Guelders (Gelre in Dutch). He was the son of Theodoric of Wassenberg.

He may have been married to Clementia of Aquitaine, although that proposed marriage seems to be based on a falsified document.[1] It is also possible that he married an unnamed daughter of William I, Count of Burgundy.[2] Gerard had three children:[3]


  1. Szabolcs de Vajay 'Contribution à l'histoire de l'attitude des royaumes pyrénéens dans la querelle des investitures: de l'origine de Berthe, reine d'Aragon et de Navarre', Estudios Genealógicos, Heráldicos y Nobiliarios, en honor de Vicente de Cadenas y Vicent (Hidalguía, Madrid, 1978), Vol. 2, p. 386 footnote 40.
  2. Herimanni, Liber de Restauratione Sancti Martini Tornacensis 33, MGH SS XIV, p. 287.
  3. Nobility from the Lower Rhine Region from Medieval Lands
Preceded by
Count of Guelders
Succeeded by
Gerard II
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