Isabella de Clare, Countess of Hertford and Cornwall

de Clare Side

• de Clare, Gilbert 5th Earl of Hertford 1st Earl of Gloucester 1182 - 1230  (48 years)

• de Clare, 4th Earl of Hertford Richard Abt 1153 - 1217  (64 years)
• Countess of Gloucester Amicia 1160 - 1225  (65 years)

• de Clare, Earl of Hertford Roger 1116 - 1173  (57 years)
• de St. Hilaire, Maud Abt 1132 - 1193  (61 years)
• FitzRobert, 2nd Earl of Gloucester William 1116 - 1183  (67 years)
• de Beaumont, Hawise 1129 - 1197  (68 years)

Marshal Side

• Marshal, Isabel 1200 - 1240  (39 years)

• Marshal, 1st Earl of Pembroke William 1146 - 1219  (73 years)
• de Clare, Isabel FitzGilbert Abt 1172 - 1220  (48 years)

• FitzGilbert, John "The Marshal" Abt 1106 - 1165  (59 years)
• d'Evereaux, Sibyl Abt 1127 - 3 Jun
• de Clare, 2nd Earl of Pembroke Richard FitzGilbert "Strongbow" Abt 1130 - 1176  (46 years)
• MacMurrough, Eve (Aoife) Abt 1141 - Aft 1186  (> 46 years)