| Name | Color | Sex | Year of birth | Microchip | Sire | Dam | Breed | Breeder |
|---|---|---|---|---|---|---|---|---|
| Sybil's Sister | bay | f | 1943 | Nearco | Sister Sarah | Thoroughbred | Great Britain | |
| Syebyestoimost | chestnut | f | 2011 | не введен | 0616-4 Absoliutnyi | 1171-3 Skholastika | Thoroughbred | Kuban Farm |
| Syemantika Prada | br. | f | 2010 | не введен | 0936-5 Pritok | 2522-4 Sinel | Thoroughbred | Marijskoe |
| Syevyeryanin | chestnut | c | 2009 | не введен | 0442-3 Sonet | 4545-6 Vegarda | Thoroughbred | Mr. Nychepurenko V.I. |
| Sygnet | c | 1944 | Thoroughbred | Italy | ||||
| Sylistrja | bay | f | 1947 | William of Valence | Sylmar | Thoroughbred | Great Britain | |
| Sylla | chestnut | f | 1931 | Thoroughbred | France | |||
| Sylmar | br. | f | 1937 | Easton | Sweet Olive | Thoroughbred | Great Britain | |
| Sylph | bay | f | 1877 | Glenelg | Squeeze-Em | Thoroughbred | USA | |
| Sylva | grey | f | 1762 | Belsize Arabian | Partner mare | Thoroughbred | Great Britain |