Lord Douglas married first (1771) Lady Lucy Graham (1751–1780), daughter of the 2nd Duke of Montrose, and secondly (1783) Lady Frances Scott (1750–1817), sister of the 3rd Duke of Buccleuch.
Caroline Lucy Scott, Lady Scott (1784–1857), novelist, second daughter of Archibald, first baron Douglas (1748–1827), by Frances, sister of Henry, third duke of Buccleuch, was born on 16 February 1784.
Home was born at Dalkeith House, Midlothian (the seat of his maternal grandfather), the son of Alexander Home, 10th Earl of Home, by Lady Elizabeth Scott, daughter of Henry Scott, 3rd Duke of Buccleuch.
Returning in 1792, he was recommended to the government by Henry Scott, 3rd Duke of Buccleuch, father of the Earl; and was appointed private secretary to Henry Dundas when Secretary for War in 1794.
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