Risk (牝 1929 鹿毛 Sir Gallahad)
 |-- Sky Larking (牡 1935 鹿毛 Blue Larkspur)
 |-- Our Treat (牝 1936 鹿毛 Stimulus)
 |   `-- Sis Lea (牝 1945 鹿毛 Bull Lea)
 |-- Little Risk (牝 1937 鹿毛 Stimulus)
 |   |-- Fair Return (牝 1944 鹿毛 Blenheim)
 |   |   `-- スマートカムバツク Smart Comeback [米] (牝 1969 栗毛 Smart)
 |   `-- Cyclotron (牡 1948 鹿毛 Pensive)
 |-- Best Risk (牝 1940 黒鹿毛 Blenheim)
 |   `-- All Hands (牡 1957 黒鹿毛 Turn-to)
 |-- Beaugay (牝 1943 鹿毛 Stimulus)
 |   `-- Gay Busher (牝 1954 鹿毛 Mr. Busher)
 |       `-- Allege (牝 1960 栗毛 Jet Pilot)
 |-- Blue Fantasy (牝 1944 鹿毛 Blue Larkspur)
 |   `-- Lady Fantasy (牝 1955 鹿毛 Lord Boswell)
 |       `-- Lady of Legend (牝 1964 鹿毛 Tipoquill)
 `-- Run a Risk (牝 1946 栗毛 Count Fleet)
     |-- Roman Risk (牝 1955 鹿毛 Roman)
     |   `-- Grey Oil (牝 1959 芦毛 Oil Capitol)
     `-- Enchanted Song (牝 1961 栗毛 Spy Song)
         `-- Hempens Song (牝 1969 栗毛 Hempen)