| Sons | Grand-sons | |
Boulder Dulcinia   Boulder Stone x Boulder Nell |
Boulder Beauty Young Mahomet (uk-usa) x Boulder Dulcinia |
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| Dulcinea (usa 1914) Belles Boy x Boulder Dulcinia |
Belendin (usa) King George V I (usa 1908) x Dulcinea (usa 1914) |
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Buddy (usa 1914)  King George V I (usa 1908) x Dulcinea (usa 1914) |
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| Connors Delight Boulder Billy Boy x Dulcinea (usa 1914) |
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| Peggy V Boulder Billy Boy x Dulcinea (usa 1914) |
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| Queenie ( Stahlman) Boulder Billy Boy x Dulcinea (usa 1914) |
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| Spring Maid (220327) King George V I (usa 1908) x Dulcinea (usa 1914) |
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| Whitey I I Boulder Billy Boy x Dulcinea (usa 1914) |