| Sons | Grand-sons | |
Brynhyfryd Sweetheart   Hefty Son O' Mike (uk-usa) x Lady Tams |
Ash Lea Queen Brynhyfryd Smasher x Brynhyfryd Sweetheart |
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| Brynhyfryd Heartsease Brynhyfryd Smasher x Brynhyfryd Sweetheart |
Hefty Mike  Knowsley Boy x Brynhyfryd Heartsease Knowsley Boy x Brynhyfryd Heartsease |
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| Hyfryg Imperator Hazelwood Samson x Brynhyfryd Heartsease Hazelwood Samson x Brynhyfryd Heartsease |
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| Lady Diana I V Hazelwood Samson x Brynhyfryd Heartsease Hazelwood Samson x Brynhyfryd Heartsease |
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| London Derry Knowsley Boy x Brynhyfryd Heartsease Knowsley Boy x Brynhyfryd Heartsease |
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| Brynhyfryd Lady Ermine Brynhyfryd Smasher x Brynhyfryd Sweetheart |
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| Brynhyfryd Mary Brynhyfryd Smasher x Brynhyfryd Sweetheart |
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| Brynhyfryd Old Dutch Brynhyfryd Smasher x Brynhyfryd Sweetheart |
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| Buster V (can) Brynhyfryd Smasher x Brynhyfryd Sweetheart |