David Erskine, 2nd Lord Cardross

Erskine was the only son of Henry Erskine, second son of the second marriage of John Erskine, 18th Earl of Mar, and heir to the Barony of Cardross, by his wife Margaret, only daughter of Sir James Bellenden of Broughton, near Edinburgh. On the death of his grandfather in December 1634 he became vested in the title of Cardross, and was served heir to his father in the barony, 17 March 1636–7.

He was one of the few peers who protested against the delivering up of Charles I to the English army at Newcastle in 1646, and was a promoter of the "engagement" in 1648, for which he was fined £1,000, and debarred from sitting in parliament in 1649.

Cardross was twice married: first, in 1645, to Anne, fifth daughter of Sir Thomas Hope of Craighall, by whom he had Henry Erskine, 3rd Lord Cardross; and secondly, in 1655, to Mary, youngest daughter of Sir George Bruce of Carnock, Fifeshire.

He died in 1671.