Penny Rock (牝 1925 栗毛 Rocksavage)
 |-- Millrock (牝 1931 鹿毛 Milton)
 |   |-- Milling (牡 1940 黒鹿毛 Mieuxce)
 |   |-- Millstream (牝 1941 鹿毛 Mieuxce)
 |   |   |-- Medway (牡 1948 栗毛 Orthodox)
 |   |   |        3着 - 1951 英セントレジャー(G1)
 |   |   |-- Reel In (牝 1952 鹿毛 Jock Scot)
 |   |   |-- Milady (牝 1953 鹿毛 Sayajirao)
 |   |   |-- Sunol (牝 1956 鹿毛 My Babu)
 |   |   `-- Palestream (牝 1959 芦毛 Palestine)
 |   `-- Live Letters (牝 1943 黒鹿毛 Mieuxce)
 |       `-- Please (牝 1950 鹿毛 Tehran)
 `-- Honest Penny (牝 1939 栗毛 Fair Trial)
     |-- Baccarat (牝 1946 鹿毛 Big Game)
     |   |-- Plaque (牝 1952 栗毛 Nearco)
     |   `-- La Bonne Auberge (牝 1956 栗毛 Blue Peter)
     |-- Pennywise (牝 1954 鹿毛 Hyperion)
     |   `-- Wise Countess (牝 1966 Count Amber)
     `-- Gainsworth (牡 1956 栗毛 Hyperion)