| Name | Erlkönig (AH) |
| YoB | 1906 |
| Sex | horse |
| Colour | bay |
| Sire | Trevillian (US), 1889 |
| Dam | April Fool (ex The April Fool) (US), 1892 |
| Damsire | Jay Bird (US), 1878 |
| Breeder | Graf Simon Wimpffen |
| Birthplace | Fahrafeld a. d. Triesting, Bez. Baden, Nieder-Österreich (Pottenstein, Niederösterreich) |