Duchess (牝 1748 鹿毛 Whitenose[Portmore's])
 |-- Le Sang (牡 1759 鹿毛 Changeling)
 |-- Dux (牡 1761 鹿毛 Matchem)
 |-- Chymist (牝 1765 鹿毛 Matchem)
 `-- Pyrrha (牝 1771 鹿毛 Matchem)
     |-- Herod Mare (牝 1780 Herod)
     |-- Fenwick's Herod Mare (牝 1780 鹿毛 Herod)
     |   |-- King Fergus Mare (牝 1790 鹿毛 King Fergus)
     |   `-- Beningbrough (牡 1791 鹿毛 King Fergus)
     |            1着 - '94英セントレジャー
     |-- Fenwicks Herod Mare (牝 1780 鹿毛 Herod)
     |   `-- Zechariah (牡 1796 鹿毛 King Fergus)
     |-- Young Marske Mare (牝 1786 鹿毛 Young Marske)
     |   `-- Phoenomenon Mare (牝 1796 鹿毛 Phoenomenon)
     `-- Beatrice (牝 1791 鹿毛 Sir Peter)
         |-- Vicissitude (牝 1800 鹿毛 Pipator)
         |-- Streatlam Lass (牝 1803 鹿毛 Pipator)
         `-- Remembrancer Mare (牝 1812 鹿毛 Remembrancer)