William Stanley, 6th Earl of Derby in the context of "Shakespeare authorship question"

Claims that someone other than William Shakespeare of Stratford-upon-Avon wrote the works traditionally attributed to him were first explicitly made in the 19th century, though supporters of the theory often argue that coded assertions of alternative authorship exist in texts dating back to Shakespeare's lifetime. Typically, they say that the historical Shakespeare was merely a front to shield the identity of the real author or authors, who, for reasons such as social rank, state security, or gender, could not safely take public credit. Although these claims have attracted much public interest, all but a few Shakespeare scholars and literary historians consider them to be fringe theories with no hard evidence, and for the most part disregard them except to rebut or disparage the claims.

The basis for these theories can be traced to the 18th century, when, more than 150 years after his death, Shakespeare's status was elevated to that of the greatest writer of all time. Shakespeare's pre-eminence seemed incongruous with his humble origins and obscure life, arousing suspicion that he was not the author of the works attributed to him. At the same time, the influence of biblical higher criticism led some authors to take the view that Shakespeare's works could be the product of the collaborative efforts of many authors. Public debate and a prolific body of literature date from the mid-19th century, and numerous historical figures, including Francis Bacon, the Earl of Oxford, Christopher Marlowe and the Earl of Derby, have since been nominated as the true author.