Albus is Dumbledore’s first name in the Harry Potter books.
His full name is Albus Percival Wulfric Brian Dumbledore. He is introduced as the headmaster of Hogwarts and one of the most powerful and influential wizards in the series. The first name Albus appears in school records, official correspondence, and the names of magical objects connected with him.
Dumbledore’s other names can cause confusion. Percival is his middle name and also the name of his father, while Aberforth is his younger brother. Armando Dippet was an earlier Hogwarts headmaster, not Dumbledore’s first name. Dumbledore’s given name is also used in the title of the companion stage play Harry Potter and the Cursed Child’s character references, but the question concerns the seven main novels. His name is pronounced with the emphasis commonly placed on the first syllable in English-language editions.