Iseult (牝 1930 鹿毛 Sir Gallahad)
 |-- Merry Lassie (牝 1935 鹿毛 Stimulus)
 |   `-- Laughter (牝 1941 鹿毛 Johnstown)
 |       `-- Hilarious (牡 1950 鹿毛 Bimelech)
 |-- Navigating (牝 1940 鹿毛 Hard Tack)
 |   `-- Airmans Guide (牝 1957 鹿毛 One Count)
 |       |-- Native Guide (牝 1967 鹿毛 Raise a Native)
 |       `-- Airman's Flag (牝 1975 鹿毛 Hoist the Flag)
 |-- Arrogance (牝 1944 鹿毛 Snark)
 |   `-- Sister Snob (牝 1957 鹿毛 Mr. Busher)
 |       `-- Holly-O. (牝 1963 鹿毛 Victory Morn)
 `-- Why (牝 1947 鹿毛 Questionnaire)
     `-- Why Lie (牡 1957 鹿毛 Alibhai)