| b 04 Sep 1286, Chamb, Norfolk, , England | Nele or Nigel De_Mowbray | > | d 23 Mar 1321, | William De_Mowbray | Mabel Fitz Patrick | > |
| Roger De Mowbray | b 1172 | |||
| | b 1218 | Avice De_Mowbray | |||
| Roger De Mowbray | d Nov1266 | b 1176 | William De Beauchamp | > |
| |b 1254 | | | William De Beauchamp | Ida 'Camvile' Longespee | > |
| |d 21 Nov 1297 | Maud Beauchamp | b 1232 | ||
| | | b 1206 | Avice | ||
| John De Mowbray | d Apr1273 | b 1184 | Richard De Clare, [Earl] | > |
| |Alivia Braos-2 + | Gilbert De Clare | Amice Fitzrobert, Countess | > | |m 1298 | Richard De Clare | b 1182 | William Marshall, [Earl] | > |
| | | |b 04 Aug 1222 | Isabel Marshall | Isabel De Clare, [Countess] | > |
| Roese De Clare | d 15 Jul 1262 | b 1203 | Roger De Lacie | > |
| b 1256 | | | John De_Lacy | Maud (Matilda) De Clare | > |
| Maud De_Lacy | b 1192 | Robert De Quincy | > | |
| b 1223 | Margaret De Quincy | Hawise De Meschines, [Countess] | > | |
| d 10 Mar 1288 | b 1208 | |||
| 1 | < | John De Mowbray, [Baron Mowbray] |