| b 1340, Of, Bampton, Devonshire, England | John Cogan | > | d 22 Jul 1382, | John Cogan | Juliana Fitz_Maurice | > |
| Thomas Cogan | b 1245 | |||
| | b 1286 | Mrs-John De Cogan | |||
| Richard De Cogan | d 20 Feb 1314 | b 1262 | ||
| |b 09 Oct 1299 | | | |||
| |d 20 Apr 1368 | Petronilla | |||
| | | b 1286 | |||
| William Cogan, [Sir Knight] | William De_Montacute | |||
| |Katherine-1 + | Simon De Montagu, [Baron Montagu] | Beota | |m 1364 | William De Montagu, [Baron Montagu] | b 1250 | Amauri De Saint_Amand |
| | | |b 1275 | Hawaise De Saint_Amand | Mrs-Amauri De Saint_Amand | |
| Mary De Montagu | d 18 Oct 1319 | b 1252 | Peter De Montfort | > |
| b 1313 | | | Peter De Montford | Alice De Aldithley | > |
| Elizabeth De Montfort, [Baroness] | b 1230 | John De Warr | > | |
| b 1271 | Matilda De La Warr | |||
| d 1345 | b 1242 | |||