| Name | Color | Sex | Year of birth | Microchip | Sire | Dam | Breed | Breeder |
|---|---|---|---|---|---|---|---|---|
| Sylva Belle | chestnut | f | 1887 | Saint Editha | Thoroughbred | Great Britain | ||
| Sylvan | chestnut | f | 1910 | Disguise | Sylva Belle | Thoroughbred | USA | |
| Sylvanecte | f | Silver Shark | Caledonian Market | Thoroughbred | France | |||
| Sylvia | chestnut | f | 1783 | Young Marske | Ferret | Thoroughbred | Great Britain | |
| Sylvia Dunbar | bay | f | 1907 | Orsini | Maid of Dunbar | Thoroughbred | USA | |
| Sylvie | bay | f | 1891 | Thoroughbred | France | |||
| Sylyk | chestnut | c | 1972 | 3084 Lugansk | 3500 Svirel | Thoroughbred | Issyk-Kul Stud | |
| 4831-6 Symbol of Success | bay | f | 2012 | Afleet Alex | Proud Angel | Thoroughbred | USA | |
| Symbolic Gesture | d.-bay | f | 2013 | Bernardini | Sweet Life | Thoroughbred | USA | |
| Symbolical | br. | f | 1908 | Symington | Revolver | Thoroughbred | Great Britain |