| Figli | Nipoti | |
Firbeck Duchess   Mahomet Stone x Lady Idonia |
Derbyshire Diamond  Silver Ingot x Firbeck Duchess |
Derbyshire Doll (uk-usa)  Derbyshire Diamond x Broscroft Bessy Derbyshire Diamond x Broscroft Bessy |
| Strathtay Corimbla Patch (uk-usa) Derbyshire Diamond x Broscroft Bessy Derbyshire Diamond x Broscroft Bessy |
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| Strathtay Corimbla Peggy (uk-usa) Derbyshire Diamond x Duchess Pride Derbyshire Diamond x Duchess Pride |
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Iron Chancellor (uk-can)  Silver Tugos x Firbeck Duchess |
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| Lali Dela Quality x Firbeck Duchess |
Harrington Winner Upperthorpe Gold Star x Lali Upperthorpe Gold Star x Lali |