Keystone (牝 1903 鹿毛 Persimmon)
 |-- Hemlock (牝 1913 鹿毛 Spearmint)
 |   |-- Conine (牝 1918 鹿毛 Lemberg)
 |   |   `-- Blow Out (牝 1928 鹿毛 Blue Pete)
 |   |-- Cicuta (牝 1919 鹿毛 Nassovian)
 |   |   `-- Display (牡 1923 鹿毛 Fair Play)
 |   `-- Posterity (牡 1926 鹿毛 Son-in-Law)
 |-- Trestle (牝 1915 黒鹿毛 Swynford)
 |   `-- Pyramid (牝 1927 黒鹿毛 Papyrus)
 |       |-- The Nile (牝 1932 黒鹿毛 Pharos)
 |       |-- Pylon (牡 1933 黒鹿毛 Pharos)
 |       |-- Ad Astra (牝 1935 黒鹿毛 Asterus)
 |       |-- Lighthouse (牡 1937 黒鹿毛 Pharos)
 |       |-- Feriel (牝 1940 鹿毛 Brantome)
 |       |-- Queen Nitocris (牝 1941 鹿毛 Fairway)
 |       `-- Sky High (牡 1943 鹿毛 Hyperion)
 |-- Keysoe (牝 1916 黒鹿毛 Swynford)
 |   |-- Caissot (牡 1923 栗毛 Gay Crusader)
 |   `-- Flittemere (牝 1926 栗毛 Buchan)
 |       `-- Indian Call (牝 1936 鹿毛 Singapore)
 |-- Archaic (牡 1917 栗毛 Polymelus)
 |-- Phalange (牝 1921 鹿毛 Phalaris)
 |   `-- High Force (牝 1929 栗毛 Gainsborough)
 |       `-- Hiroszima (牝 1944 黒鹿毛 Pharos)
 `-- Bythorne (牝 1924 黒鹿毛 Swynford)