Seigneur de Château-Gonthier. The Chronicon Turonense Abbreviatum records that "Castrum Raginaldi" was built in 1044. “Rainaldus castri Guntherii et castri Rainaldi, in pago Turonico dominus”, after being captured “in bello a Britannis” but later freed after giving as hostages “duobus filiis suis Rainaldo et Guicherio”, renounced claims over the forest of Blémars “cum uxore sua Lisabellis”, by charter dated 1063. "Rainaldus de Castro Rainaldi uxorque mea Helisabeth" donated "ecclesiam Sancti Andreæ de Castro Rainaldi" to Tours, with the consent of "domini mei Gauffredi comitis", Saint-Julien by charter dated 1066, after 4 Aug.
The Chronica Rainaldi names "Gaufrido de Pruilliaco, Rainaldo de Castro Gunterii, Giraldo de Mosterolo" as the three main conspirators in the betrayal of "Goffridus junior…Barbatum" by "Fulconi fratri suo…Non Apr" in 1067, during which they were killed. The Chronicon Vindocinense records that "Gaufredo…de Prulliaco, Rainaldo de Castro-Gunterii, Giraldo de Monasteriolo" were captured and killed in 1067 after Foulques IV "le Réchin" Comte d’Anjou captured and imprisoned "fratrem suum…comes Gaufredus junior…Barbatum". A charter dated to [1080] records a claim by "Rainaldum de Castro-Gunterii", who then held "in Turonia castrum Rainaldi", against Marmoutier which was decided by ordeal of fire and finally settled in the court of his grandson. 1
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