| Name | April Fool (AH) |
| YoB | 1903 |
| Sex | horse |
| Colour | dark bay |
| Sire | Tonquin (US), 1888 |
| Dam | Linda (AH), 1892 |
| Damsire | ? |
| Breeder | Szloboda János |
| Birthplace | Geszt, Kom. Pressburg, Ungarn (Hoste, Slovenská republika) |
| April Fool (AH), 1903 | Tonquin (US), 1888 | Lord Russell (US), 1881 | Harold (US), 1864 |
| Miss Russell (US), 1865 | |||
| Tricara (US), 1882 | Annapolis (US), 1878 | ||
| Bicara (US), 1871 | |||
| Linda (AH), 1892 | ? | ? | |
| ? | |||
| ? | ? | ||
| ? |