The author of the Harry Potter series, J.K. Rowling, announced that information. Albus Dumbledore was in love with a friend from his teenager years, Gellert Grindelwald. These feelings were not returned.
In 1945, Dumbledore duelled Grindelwald and defeated him after he became a dark lord. Grindelwald was then the master of the Elder wand and after his defeat, Dumbledore became the master.
Not that we know of. By the way, the author has stated (outside the books, in interviews), that Dumbledore was gay.
The character, Albus Dumbledore, in "Harry Potter" is gay. The actor, Michael Gambon, is not.
Albus Dumbledore's brother is Aberforth Dumbledore.
Albus Dumbledore was created in 1997.
Severus Snape used a killing curse on Albus Dumbledore.
No, Albus Dumbledore doesn't smoke a pipe.
Aberforth Dumbledore is his full name. No middle name has ever been mentioned.
His full name is stated as Albus Percival Wulfric Brian Dumbledore.
Albus Dumbledore did.
Professor Dumbledore's full name is Albus Percival Wulfric Brian Dumbledore
Professor Albus Percival Wulfric Brian Dumbledore
Albus Dumbledore didn't release any songs.