Robert of Caen, 1st Earl of Gloucester (b c1090, d 31.10.1147)
m. (1119) Mabel of Gloucester (d 1157, dau of Robert FitzHamon of Gloucester)
i. William FitzRobert, 2nd Earl of Gloucester (d 23.11.1183)
m. (1150) Hawise de Beaumont (d 24.04.1197, dau of Robert, 2nd Earl of Leicester)
a. Robert (dvp unm 1166)
b. Amicia FitzRobert (b 1160, d 01.01.1225) JRY
m. (1180, div before 1200) Richard de Clare, 4th Earl of Hertford (b 1162, d 30.12.1218) JRY
c. Maud/Mabel of Gloucester (d 1188)
m. (1170) Amaury de Montfort, Count of Evreux (b c1151, d 1182)
d. Isabella, Countess of Gloucester (b c1170, dsp 1217)
m1. (29.08.1189, div 1189) John Plantagenet, 'Lackland', King John of England (b 24.12.1166, d 18.10.1216)
m2. (1214) Geoffrey Mandeville, 2nd/5th Earl of Essex, Earl of Gloucester (dsp 1216)
m3. (1217) Hubert de Bourgh, Earl of Kent (d 04.03.1243)
ii. Mabel FitzRobert
m. Aubrey de Vere
iii. Maud FitzRobert (d 29.07.1189) HJRY
m. (1141) Ranulph 'de Gernons' de Meschines, 2nd Earl of Chester (d 16.12.1153) HJRY
iv.+ other issue - Philip, Robert, Richard, Hamon (d c1158), Richard (d 1142, Archbishop of Rouen), Roger (d 1179, Bishop of Worcester)