| breed | Thoroughbred |
| color / sex / birth date | chestnut c ., 1980 |
| breeder | USA |
| Sire line | Nearco |
| Dam line | Old Merlin mare |
| foaling reference | Ам. |
| Owner | USA |
|
Halo
(USA)
USA d.-bay, 1969 |
Hail to Reason
(USA)
br., 1958 |
Turn-To
(IRE)
bay, 1951 |
|
Nothirdchance
(USA)
bay, 1948 |
||
|
Cosmah
(USA)
bay, 1953 |
Cosmic Bomb
(USA)
d.-bay, 1944 |
|
|
Almahmoud
(USA)
chestnut, 1947 |
||
|
Double Axle
(USA)
USA chestnut, 1974 |
The Axe II
(USA)
grey, 1958 |
Mahmoud
(FR)
grey, 1933 |
|
Blackball
(USA)
d.-bay, 1950 |
||
|
Snow Bower
(USA)
bay, 1969 |
Nearctic
(CAN)
d.-bay, 1954 |
|
|
Sulenan
(GB)
1963 |