| | Thomas de Lathom 1330–1381 Isabella Pilkington 1346–… | | |
| | Thomas de Lathom 1301–1370 | | |
| | Hawise Muscegros 1276–1375 | | |
| | Robert de Muscegros 1254–… | | | | William de Ferrers 1200–1254 Margaret de Quincy 1218–1284 | | | | Roger de Quincy 1204–1264 Helen de Galloway 1208–1245 |
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| | | John de Muscegros 1232–1275 Cecily (Dulcia) Avenal 1244–1301 | | | | Robert de Muscegros 1207–1253 Helewisia Malet 1200–1287 | | | | Richard de Muscegros 1182–… | | | | Robert de Muscegros 1158–… | | |
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