William.IV v.Derby (1172-1247) |
Agnes Kevelioc (1174-1249) |
Bertha de Ferrers (1210- ) |
Sibylle de Ferrers (1216- ) |
Roger de Quincy (1200-1264) |
Helen v.Galloway ( -1245) |
William.V v.Derby (1193-1254) |
Marg.II de Quincy ( -1280) |
William.VI Ferrers (1240-1298) |
Joan Ferrers (1241-1310) |