Gilbert de Clare, 5th Earl of Gloucester, 5th Earl of Hertford, was born 1180 to Richard de Clare, 4th Earl of Hertford (c1153-1218) and Amice FitzRobert, Countess of Gloucester (c1160-1220) and died 25 October 1230 of unspecified causes. He married Isabel Marshal (1200-1240) 9 October 1217 JL . William I of England (1027-1087), Hugh Capet (c940-996), Rollo of Normandy (860-932), Alfred the Great (849-899)/s, Charlemagne (747-814)/s, Hugh Capet (c940-996)/s, Rollo of Normandy (860-932)/s.
|Agnes de Clare (1218-)|
|Amice de Clare (1220-1287)|
|Richard de Clare, 6th Earl of Hertford (1222-1262)||4 August 1222||15 July 1262||Megotta de Burgh |
Maud de Lacy, Countess of Lincoln (1223-c1287)
|Isabel de Clare (1226-1264)||2 November 1226||10 July 1264||Robert de Brus (c1210-1295)|
|William de Clare (1228-1258)|
|Gilbert de Clare (1229-)|