| b 1275, Of, Cassington, Oxfordshire, England | d 18 Oct 1319, | |||
| William De_Montacute | ||||
| | b 1210 | ||||
| Simon De Montagu, [Baron Montagu] | ||||
| |b 1250 | | | |||
| |d 26 Sep 1316 | Beota | |||
| | | b 1212 | |||
| William De Montagu, [Baron Montagu] | ||||
| |Elizabeth De Montfort, [Baroness] | |m 1292 | Amauri De Saint_Amand | ||
| |Of, Cassington, Oxfordshire, England | |b 1211 | |||
| Hawaise De Saint_Amand | ||||
| b 1252 | | | |||
| d 1287 | Mrs-Amauri De Saint_Amand | |||
| b 1213 | ||||