[2] On 30 October 1732, according to a special remainder, he succeeded his oldest brother Alexander as baronet.
[1] In 1732, Cairnes entered the Irish House of Commons for Monaghan Borough, the same constituency Alexander had represented before, and sat for it until his death in 1743.
[1] On 10 July 1711, he married Frances Gould, daughter of John Gould, his brother's brother-in-law and a Director of the East India Company, at St Peter le Poer in London.
[1] He died childless on 16 June 1743 and with his death the baronetcy became extinct.
[1] His widow died on 8 March 1750 and was buried 3 days later at Putney.