| Name | Color | Sex | Year of birth | Microchip | Sire | Dam | Breed | Breeder |
|---|---|---|---|---|---|---|---|---|
| Sonorita | f | 1985 | Dixieland | Sonora | Thoroughbred | Poland | ||
| Sonrisa | chestnut | f | 1931 | Polymelian | Many Smiles | Thoroughbred | USA | |
| Sonsa | chestnut | f | 1953 | Hyperion | Duplicity | Thoroughbred | Great Britain | |
| Sonsyad | br. | c | 1881 | Owen | Squib | Thoroughbred | ||
| Sontaruli | chestnut | f | 1972 | 0216-2 Ashkhabad | 4037 Solidnaya | Thoroughbred | Kullar Stud | |
| Sony Ka | d.-bay | c | 2017 | 1602-7 Smart | 5550-7 Fanagoriya Ka | Thoroughbred | Mr Kusainov D.N. | |
| Sooja | chestnut | f | 1909 | Sorrento | Komissarzhevskaya | Thoroughbred | Hungary | |
| Sookera | d.-bay | f | 1975 | Roberto | Irule | Thoroughbred | USA | |
| Sooloo | f | 1858 | Stockwell | Thoroughbred | Great Britain | |||
| Soon Belle | chestnut | f | 2005 | 643098100043511 | Black Sam Bellamy | 1664-4 Sukoon | Thoroughbred | Volgogradsk Stud |