| Pedigree for Marston Tom Thumb | 
| Sire Cowbridge Jock EM174 Black Horned | La Mancha Still EM79 Horned | La Mancha Harold  F.S. EM19 Red Horned | No Record - Foundation Sire EM00 Horned | Horned | 
| Horned | ||||
| No Record - Foundation Dam EF00 Horned | Horned | |||
| Horned | ||||
| La Mancha College Kate EF8 Horned | No Record - Foundation Sire EM00 Horned | Horned | ||
| Horned | ||||
| No Record - Foundation Dam EF00 Horned | Horned | |||
| Horned | ||||
| Upminster Dainty Dish EF246 Horned | No Record - Foundation Sire EM00 Horned | Horned | ||
| Horned | ||||
| No Record - Foundation Dam EF00 Horned | Horned | |||
| Horned | ||||
| Dam La Mancha Rosie F.S. EF868 Red Horned | No Record - Foundation Sire EM00 Horned | Horned | ||
| Horned | ||||
| No Record - Foundation Dam EF00 Horned | Horned | |||
| Horned | ||||

