Percival Dumbledore

Percival Dumbledore was the father of Albus Dumbledore, the noted Headmaster of Hogwarts School of Witchcraft and Wizardry. He and his wife Kendra had three children: Albus, Aberforth, and Ariana.

History
When Percival's daughter Ariana Dumbledore was assaulted and emotionally scarred by three Muggle boys, he attacked them and was arrested and convicted by the Ministry of Magic for this crime. He was sentenced to Azkaban, where he later died. Percival never gave up the reasons for his attack on the Muggles because he feared that if the Ministry found out about Ariana Dumbledore's state, they would send her to St. Mungo's Hospital for Magical Maladies and Injuries for the rest of her life. Many people believed that his son Albus would be the same, just hating muggles.

This led many to believe that Percival was a supporter of the notion of blood purity who attacked the boys simply because they were Muggles, although this is probably untrue, since Percival's own wife was a Muggle-born witch.

Physical appearance
As a relatively young wizard, Percival was "a good-looking man with eyes that seemed to twinkle".

Etymology
Percival was a knight of the Round Table in Arthurian legend. The name is believed to be derived from the Old French percer val, meaning "to pierce the valley".