Dumbledore is portrayed by Richard Harris in the film adaptations of Harry Potter and the Philosopher's Stone and Harry Potter and the Chamber of Secrets. After Harris' death, Michael Gambon portrayed Dumbledore for all of the remaining films.
J. K. Rowling has stated that she chose the name Dumbledore, which is an Early Modern English word for "bumblebee", because of Dumbledore's love of music. She imagined him walking around humming to himself a lot.
14) What newspaper tried to discredit Dumbledore in Harry Potter and the Order of the Phoenix?
When Dumbledore insists that Lord Voldemort has returned, the Ministry of Magic does everything it can to discredit him -- mainly through the Daily Prophet, the most widely read daily newspaper in Britain's wizarding community.
15) In what book is Dumbledore demoted from Chief Warlock of the Wizengamot?
In Harry Potter and the Order of the Phoenix, Dumbledore is demoted from Chief Warlock of the Wizengamot, the wizard high court of law. He is reinstated during Harry Potter and the Half-Blood Prince, and remains in that post until his death.
16) What does Dumbledore use to teach Harry about Voldemort's past?
Aberforth Dumbledore is Albus Dumbledore's younger brother. In Harry Potter and the Deathly Hallows, Aberforth watches over Harry, Ron, and Hermione. When they are captured by Snatchers, he sends Dobby to rescue them from the Malfoy's Manor.
20) What house did the sorting hat put Dumbledore in?