James Ludovic Lindsay, 26th Earl of Crawford and 9th Earl of Balcarres, KT, FRS, FRAS was a British astronomer, politician, ornithologist, bibliophile and philatelist. A member of the Royal Society, Crawford was elected president of the Royal Astronomical Society in 1878. He was a prominent Freemason, having been initiated into Isaac Newton University Lodge at the University of Cambridge in 1866.

Alexander William Crawford Lindsay, 25th Earl of Crawford, 8th Earl of Balcarres, styled Lord Lindsay between 1825 and 1869, was a Scottish peer, art historian and collector.