| Name | Zorko (AH) |
| YoB | 1896 |
| Sex | horse |
| Colour | bay |
| Sire | Clear Grit (US), 1885 |
| Dam | Zora (AH), 1889 |
| Damsire | Chief, Hbl. |
| Breeder | Johann Rajh |
| Birthplace | Mautdorf, Bez. Luttenberg, Steiermark (Mota, Ljutomer, Slovenija) |
| Zorko (AH), 1896 | Clear Grit (US), 1885 | Old Clear Grit (US), 1861 | Lapidist xx (GB), 1849 |
| Cock of the Rock Mare (morgan) (US) | |||
| ? | ? | ||
| ? | |||
| Zora (AH), 1889 | Chief, Hbl. | ||
| e. Landes-St. | ? | ||
| ? |