Professor Albus Percival Wulfric Brian Dumbledore, O.M. (First Class), was a British wizard who was the Transfiguration Professor and later Headmaster of Hogwarts School of Witchcraft and Wizardry. He also served as the Chief Warlock of the Wizengamot and Supreme Mugwump of the International Confederation of Wizards. A half-blood and initially Muggle-supporting wizard, Albus was the eldest child of Percival and Kendra Dumbledore and elder brother of Aberforth and Ariana Dumbledore. His father died in Azkaban when Albus was young and his mother later died after his sister accidentally lost control of her magic, creating an explosion that killed Kendra. Albus began attending Hogwarts School of Witchcraft and Wizardry in 1892, where he would start writing with a pen-pal from Durmstrang by the