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 )
 |   |-- Formative ( 牡 1905 Seaton Delaval )
 |   `-- Piraeus ( 牝 1915 黒鹿毛 Demosthenes )
 |   |   `-- Wiwini ( 牝 1925 黒鹿毛 Tea Tray )
 `-- Monoform ( 牡 1901 栗毛 Hotchkiss )