His hair was going gray and he wanted to keep his natural luster.
Assuming you meant "die", it was a gambit he planned in advance with Snape. He was already dying slowly anyway, due to a curse on the ring Horcrux.
Albus Dumbledore's brother is Aberforth Dumbledore.
Ariana Dumbledore.
Albus Dumbledore's younger syster, Ariana
His full name is stated as Albus Percival Wulfric Brian Dumbledore.
the reason why Snape killed Dumbledore was for Dumbledore not to protect harry so that Voldemort could proceed to kill him.
Albus Dumbledore's brother is Aberforth Dumbledore.
Dumbledore's full name is Albus Percival Wulfric Brian Dumbledore.
Dumbledore, obviously.
No, Dumbledore is too old for her.
Dumbledore's young sister.
It is spelled Dumbledore.
No. Dumbledore is a fictional character.
Dumbledore's full name is Albus Percival Wulfric Brian Dumbledore, giving him three middle names.
No, he was told to kill Dumbledore by Dumbledore
The real answer is that Snape was on Dumbledore's side, so he killed Dumbledore on Dumbledore's orders. He has been a fake servant to He-Who-Must-Not-Be-Named.
Albus Percival Wulfric Brian Dumbledore and his brother was called Aberforth Dumbledore He also had a sister called Ariana Dumbledore.
Mainly, Albus Dumbledore wanted Lord Voldemort to be convinced that Severus Snape was loyal to him (Voldemort). Prof. Dumbledore was going to dye soon anyway, due to a curse which couldn't be contained.