| Name | Kozak (AH) |
| YoB | 1915 |
| Sex | horse |
| Colour | black |
| Sire | Sionill (US), 1901 |
| Dam | Dobljestnaja (RU), 1907 |
| Damsire | |
| Breeder | Egry Ferenc |
| Birthplace | Kisgejöcz, Kom. Ung, Ungarn (Mali Heivtsi, Ukraine) |
| Kozak (AH), 1915 | Sionill (US), 1901 | Big Timber (US), 1892 | Goodwood (US) |
| Passport (US) | Mambritonian (US), 1883 | ||
| Nancy (US) | |||
| Dobljestnaja (RU), 1907 | |||