The correct answer is option D (lancelot).
The novel "Don Quijote de la Mancha" written by Miguel De Servantes has a leading character whose name is Alfonso Quijano. He decides to change his name and choses Quixote since it rhymes with Lancelot (LANCELOTE in Spanish).
The word "Don" shows his social status whereas "De la Mancha" indicates the place where Quixote comes from.