A pen name, also known as a pseudonym, is a name an author uses in the place of their real name, when they write and publish things. For example, the Brontë sisters (Anne, Emily and Charlotte) who were famous authors in the 19th century used them, because they feared that people would make fun of (say bad things about) a book written by a woman. Charles Dodgson, an English math professor took the name Lewis Carroll, when he wrote fantasy stories. Erle Stanley Gardner, a best-selling American author, wrote books under numerous pseudonyms, including A. A. Fair, Kyle Corning, Charles M. Green, Carleton Kendrake, Charles J. Kenny, Les Tillray and Robert Parr, as well as under his real name.