Suppose The Harry Potter series was written by J.K. Rowling and consists of 7 books following the adventures of a young wizard named Harry Potter and his friends Hermione Granger and Ron Weasley. The series takes place at the Hogwarts School of Witchcraft and Wizardry. The main antagonist is the dark wizard Lord Voldemort, who is responsible for the death of Harry's parents.
Can we infer that "Harry Potter's real last name is Weasley."? Yes, no, or maybe?