Professor Albus Percival Wulfric Brian Dumbledore is a major character of J.K. Rowling's Harry Potter series. For most of the series, he is the headmaster of the wizarding school Hogwarts. One of the greatest wizards of his day, he is considered generally peerless in magic and highly regarded by the wizard community worldwide. So much so, that he is believed to be one of the few wizards in the world that rivals Lord Voldemort. He is the founder and leader of the Order of the Phoenix, an organisation dedicated to fighting the main antagonist of the series, Lord Voldemort.
Rowling stated 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".