Itsabet (牝 1945 栗毛 Heliopolis)
 |-- Iaway (牝 1959 栗毛 Intent)
 |   `-- Forty Whacks (牝 1967 芦毛 The Axe)
 |       `-- Minnie Whacks (牝 1973 芦毛 Minnesota Mac)
 |-- Ironically (牝 1960 栗毛 Intent)
 |   `-- Imsodear (牝 1967 鹿毛 Chieftain)
 |       |-- Dearly Precious (牝 1973 黒鹿毛 Dr. Fager)
 |       `-- イメンス Immense [米] (牝 1979 黒鹿毛 Roberto)
 |-- Iaround (牝 1961 鹿毛 Round Table)
 |   |-- Irule (牝 1968 芦毛 Young Emperor)
 |   |   `-- Sookera (牝 1975 黒鹿毛 Roberto)
 |   |-- I Encompass (牝 1970 栗毛 No Robbery) 海外7勝
 |   |   `-- I Enclose (牡 1980 鹿毛 Cormorant) 海外6勝
 |   |            1着 - ナシュアS(G3)
 |   |-- I'm a Pleasure (牝 1971 黒鹿毛 What a Pleasure)
 |   |   |-- In Jubilation (牝 1978 鹿毛 Isgala)
 |   |   `-- Noble Pursuit (牝 1992 栗毛 Affirmed)
 |   `-- I'm Worldly (牝 1974 鹿毛 Dr. Fager)
 |       `-- Ain't She a Daisy (牝 1994 鹿毛 Sabona)
 `-- Is Certain (牝 1966 黒鹿毛 No Robbery)
     `-- I'm Well Bred (牝 1982 鹿毛 Cormorant)
         `-- I'm Harriet (牝 1988 栗毛 Diesis)