Lady Henrietta Duncan-Haldane (born 1808) (b. 1808) Parents Robert Haldane-Duncan, 1st Earl of Camperdown Janet Hamilton-Dalrymple Children Wilhelmina Frederica Allen Siblings Alicia Jane Duncan-Haldane Elizabeth Baillie Duncan-Haldane Hew Adam Dalrymple Hamilton Haldane-Duncan-Mercer-Henderson Adam Haldane-Duncan, 2nd Earl of Camperdown Partners John James Allen