| Name | Color | Sex | Year of birth | Microchip | Sire | Dam | Breed | Breeder |
|---|---|---|---|---|---|---|---|---|
| Sybil | chestnut | f | 1885 | Thoroughbred | Great Britain | |||
| Sybil Brand | f | Thoroughbred | ||||||
| Sybil's Niece | chestnut | f | 1951 | Admiral's Walk | Sybil's Sister | Thoroughbred | Great Britain | |
| Sybil's Sister | bay | f | 1943 | Nearco | Sister Sarah | Thoroughbred | Great Britain | |
| Syebyestoimost | chestnut | f | 2011 | 0616-4 Absoliutnyi | 1171-3 Skholastika | Thoroughbred | Kuban Farm | |
| Syemantika Prada | br. | f | 2010 | 0936-5 Pritok | 2522-4 Sinel | Thoroughbred | Marijskoe | |
| Syevyeryanin | chestnut | c | 2009 | 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 |