Lazarus Leonard Aaronson (18 February 1895 – 9 December 1966), often published as L. Aaronson, was a British poet and lecturer in economics. He was the son of impoverished Orthodox Jewish parents who had immigrated to the East End of London from the Pale of Settlement in Eastern Europe. As a young man, he belonged to a group of Jewish friends today know as the Whitechapel Boys, many of whom later in life reached fame as writers and artist.