Robert Haldane-Duncan, 1st Earl of Camperdown peer (1785–1859) Parents Henrietta Dundas Adam Duncan, 1st Viscount Duncan Children Elizabeth Baillie Duncan-Haldane Alicia Jane Duncan-Haldane Lady Henrietta Duncan-Haldane Adam Haldane-Duncan, 2nd Earl of Camperdown Hew Adam Dalrymple Hamilton Haldane-Duncan-Mercer-Henderson Siblings Mary Tufton Duncan Henrietta Duncan Jane Duncan Adamina Duncan unknown Duncan Henry Duncan Partners Janet Hamilton-Dalrymple