Formo (牝 1884 栗毛 Sterlingworth)
 |-- Forme (牝 1891 黒鹿毛 Nordenfeldt)
 |   |-- Formosan (牡 1897 栗毛 St. Leger)
 |   `-- Formulist (牝 1899 黒鹿毛 St. Leger)
 |       `-- Reformalist (牝 1907 黒鹿毛 Renown)
 |-- Multiform (牡 1894 鹿毛 Hotchkiss)
 |-- Tres Belle (牝 1895 鹿毛 Hotchkiss)
 |   `-- Court Beauty (牝 1905 栗毛 Royal Artillery)
 |       `-- Recamier (牝 1912 黒鹿毛 Poseidon)
 |-- Formula (牝 1897 黒鹿毛 Hotchkiss)
 |   `-- Piraeus (牝 1915 黒鹿毛 Demosthenes)
 |       `-- Wiwini (牝 1925 黒鹿毛 Tea Tray)
 `-- Monoform (牡 1901 栗毛 Hotchkiss)