| breed | Thoroughbred |
| color / sex / birth date | d.-bay f ., 1967 |
| breeder | USA |
| Sire line | Nasrullah |
| Dam line | Fearnought mare |
| foaling reference | Ам. |
| Owner | USA |
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Nasco
(USA)
USA bay, 1955 |
Nasrullah
(GB)
bay, 1940 |
Nearco
(ITY)
br., 1935 |
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Mumtaz Begum
(FR)
bay, 1932 |
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Miss Disco
(USA)
bay, 1944 |
Discovery
(USA)
chestnut, 1931 |
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Outdone
(USA)
bay, 1936 |
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Regal Answer
(USA)
USA bay, 1958 |
Errard King
(USA)
bay, 1951 |
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But Definitely
(USA)
br., 1947 |
Bless Me
(USA)
br., 1939 |
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Big Wager
(USA)
chestnut, 1935 |