Springthorn (牝 1889 栗毛 Morgan)
 |-- Go On (牝 1895 栗毛 Isosceles)
 |   `-- Polar Star (牡 1904 栗毛 Pioneer)
 |-- Spring Chicken (牝 1904 栗毛 Gallinule)
 |   |-- Yokohama (牝 1911 鹿毛 Santoi)
 |   |   |-- Royal Yoke (牝 1917 芦毛 Roi Herode)
 |   |   `-- Yam (牝 1922 黒鹿毛 Hapsburg)
 |   |-- Spring Thyme (牡 1912 鹿毛 Spearmint)
 |   |-- Scaramuccia (牝 1916 栗毛 Spearmint)
 |   |   `-- Scarborough (牝 1924 黒鹿毛 Bridge of Earn)
 |   |-- Scuola d'Atene (牝 1917 鹿毛 Bayardo)
 |   |   |-- Scuola Genovese (牝 1924 鹿毛 Galloper Light)
 |   |   `-- Sanzio (牡 1928 鹿毛 Papyrus)
 |   |-- Scopas (牡 1919 鹿毛 Sunstar)
 |   |-- Scarsellino (牡 1920 黒鹿毛 Signorino)
 |   `-- Scopello (牡 1923 鹿毛 Havresac)
 `-- Shrike (牝 1905 鹿毛 Gallinule)
     `-- Gaba Tepe (牝 1914 鹿毛 St. Frusquin)
         `-- Miss Meadowes (牝 1921 鹿毛 Black Jester)