Gilbert FitzRichard DE CLARE, Earl of Hertford
- Born: Bef 1066, Clare, Risbridge, Suffolk, England
- Married: Bef 1076
- Died: 1117, Cardigan, Cardiganshire, Wales
- Buried: Clare Priory, Suffolk, England
Another name for Gilbert was Gilbert DE TONBRIDGE.
Compiler's 26/30/31 x great-grandfather
Guillaume of Jumièges names “Richardum strenuissimum militem” as the son of “comes Gislebertus filius Godefridus comitis”, adding that he donated property to Bec with “filii eius Gislebertus, Rogerius, Walterius, Rodbertus”. Orderic Vitalis names “Rogerium et Gislebertum, Gualterium et Rodbertum atque Ricardum” as the children of “Gisleberti comitis [filium] Ricardum” and his wife “Roaldem Gualterii Gifardi filiam”.
He succeeded his father in  as Lord of Clare and Tonbridge. During the rebellion of 1089 against King William II, he was besieged in Tonbridge by the king, but wounded and forced to surrender.
Lord of Cardigan 1110. "Comes Ricardus filius comitis Gisleberti" confirmed donations of property to Saint-Victor-en-Caux by "Radulfus de Vuaterivilla et Ansuuidus apud Bosunvillam", with the consent of "Rogerii filii Ricardi et comitis Gisleberti patris mei", by undated charter (a copy of which is attached to a late-12th century transcription of a charter under which Hugh de Mortimer confirmed donations to the monastery), witnessed by "Herveio de Monte Morenci…"
The Annales Cambriæ record the death in 1117 of "Gilebertus filius Ricardi". 1
Gilbert married Adelaide DE CLERMONT, daughter of Hugh DE CREIL, comte de Clermont, and Marguerite DE MONTDIDIER, before 1076. (Adelaide DE CLERMONT was born about 1072 in Clermont-en-Beauvais, Oise, Picardy, France and died in 1117 in England.)