Son of Benjamin Disraeli (1730–1816), a wealthy Italian-Jewish merchant. Isaac devoted his life to his library and miscellaneous literary works, most famously his Curiosities of Literature (1791). He corresponded with Southey on literary subjects on an intermittent basis, and dedicated the fourth edition of his The Literary Character; or the History of Men of Genius (1828) to him. Southey praised his good nature, but thought him a mixture of knowledge and ignorance. Isaac was the father of Benjamin Disraeli (1804–1881; DNB, Hist P), Prime Minister, 1868, 1874–1880.