Bertha Derby (US)
| Year of Birth | 1896 |
| Sex | mare |
| Colour | bay |
| Sire | Charles Derby (US) |
| Dam | Bertha (US) |
| Damsire | Alcantara (US) |
| Breeder | |
| Birthplace |
Pedigree
| Bertha Derby | Charles Derby (US) | Steinway (US) | Strathmore (US) |
| Katie G. (US) | Electioneer (US) | ||
| Bertha (US) | Alcantara (US) | George Wilkes (US) | |
| Alma Mater (US) | |||
| Barcena (US) | Bayard (US) | ||
| Blandina (US) |
Foals
| YoB | Name | Colour | Sex | Pedigree | Breeder | Birthplace |
|---|---|---|---|---|---|---|
| 1908 | Bertha Guy (US) | bay | mare | Guy Axworthy (US) - Bertha Derby (US) | ||
| 1909 | Baby Bertha (US) | mare | Silk Cord (US) - Bertha Derby (US) |