What pseudonym was used by the author of a spurious second part of Don Quixote?

The author of the spurious second part of Don Quixote used the pseudonym Alonso Fernández de Avellaneda. The writer’s real identity has never been established with certainty.

Avellaneda’s sequel, titled Second Volume of the Ingenious Gentleman Don Quixote of La Mancha, was published in Tarragona in 1614. It appeared before Cervantes had completed his own continuation and was unauthorized, which is why it is commonly called the spurious or apocryphal second part.

The book provoked Cervantes. In his genuine Part Two, published in 1615, he refers to Avellaneda’s work and incorporates the unauthorized sequel into the novel’s metafictional world. Don Quixote encounters people familiar with the false version and insists that its characters are impostors.

Scholars have proposed several candidates for Avellaneda, including Jerónimo de Pasamonte and associates of Cervantes’s literary rival Lope de Vega, but no identification commands consensus. Avellaneda’s name is therefore both the established pseudonym and the only safe answer to the quiz question.