The Nuttall Encyclopedia
A man of letters, born at Enfield, Middlesex; only son of a Spanish Jew settled in England, who left him a fortune, which enabled him to cultivate his taste for literature; was the author of several works, but is best known by his "Curiosities of Literature," a work published in six vols., full of anecdotes on the quarrels and calamities of authors; was never a strict Jew; finally cut the connection, and had his children baptized as Christians (1766-1848).
Wood, James, ed. Entry for 'D'israeli, Isaac'. The Nuttall Encyclopedia. https://www.studylight.org/encyclopedias/eng/nut/d/disraeli-isaac.html. Frederick Warne & Co Ltd. London. 1900.