Dumbledore’s secret brother is Aberforth Dumbledore. Aberforth is the younger brother of Albus Dumbledore and has a complicated relationship with him. Unlike Albus, Aberforth is not widely known or celebrated in the wizarding world. He is the owner of The Hog’s Head Inn, a rather shabby establishment located in the village of Hogsmeade.
Aberforth’s resentment towards his brother stems largely from the tragic death of their younger sister, Ariana. Ariana was a magical prodigy, but after a traumatic incident involving a group of Muggle boys who witnessed her performing magic, she became emotionally and mentally unstable. This event had a profound impact on the Dumbledore family, and Aberforth blames both Albus and Grindelwald for her death.
Aberforth believes that Albus, who was highly ambitious and driven, was too focused on his own pursuits of power and knowledge to properly care for Ariana. He resents the fact that Albus left him to shoulder much of the burden of caring for their sister, as well as the guilt and grief that came with it. This resentment has created a rift between the two brothers that has lasted for many years.
In addition to his resentment towards Albus, Aberforth also holds a deep grudge against Grindelwald, the dark wizard who became a close friend and confidante of Albus. Aberforth sees Grindelwald as the catalyst for the events that led to Ariana’s death. Grindelwald’s radical ideologies and thirst for power led to a violent confrontation between the three brothers, resulting in Ariana’s accidental death.
Aberforth’s anger and bitterness towards both his brother and Grindelwald have shaped his life and his attitude towards the wizarding world. He has chosen to isolate himself in the run-down Hog’s Head Inn, which is known for its rather shady clientele. Aberforth’s resentment has also fueled his desire to expose the truth about his brother and Grindelwald’s actions, leading him to become involved in the fight against dark forces.
Aberforth Dumbledore is a complex and deeply troubled character. His resentment towards his brother and Grindelwald, as well as the tragic loss of his sister, have shaped his life and actions. His involvement in the wizarding world, although often overlooked, is significant in its own right, as he seeks to uncover the truth and seek justice for his family.