Joybird (牝 1932 鹿毛 Bull Dog)
 |-- Songburst (牝 1941 黒鹿毛 Blenheim)
 |   `-- Drift Song (牝 1948 鹿毛 Heliopolis)
 |       |-- Fleet Song (牝 1953 鹿毛 Hierocles)
 |       `-- Troilus (牡 1956 鹿毛 Priam)
 |-- I Declare (牝 1944 鹿毛 Heliopolis)
 |   `-- I Salute (牝 1950 鹿毛 Brookfield)
 |       |-- I Recall (牝 1959 鹿毛 Prince John)
 |       `-- Iyearn (牝 1965 鹿毛 Francis S.)
 `-- Blue Charmer (牝 1947 鹿毛 Blue Larkspur)
     `-- Real Sincere (牝 1955 鹿毛 Brookfield)
         |-- Cutty (牝 1969 鹿毛 Smart)
         `-- Flirt (牝 1972 鹿毛 Metropolitan)