So, when a wand as important and significant as the Elder Wand, would not be out of his sight or knowledge. So, when Garrick Ollivander could not provide too many details about the Elder Wand, Voldemort thought he was lying, so he tortured him.

Lord Voldemort

He has to be old. He gave Voldemort his wand when he started school and Voldemort was 70 when he died. If we can assume he was at the least 18 years old when he gave Tom his wand and that he just took over the store that puts him 18 plus years older than Voldemort so decently older than 88.

Ollivander attended Hogwarts and was sorted into Ravenclaw House. He is married and has two children, a son, and a daughter, who is deceased.

Though the Ollivander family was one of the families listed in the Pure-Blood Directory written in the 1930s, Garrick Ollivander, who was born prior to this, was a half-blood.

Later, when cornered by several Death Eaters after triggering the Taboo, Kingsley single-handedly fought them off. While Kingsley was unable to defeat Bellatrix Lestrange during the Battle of the Department of Mysteries, he did hold his ground for a time and survived, albeit injured.

Rowling said in an interview that Dumbledore was about 150 years old. However, on her website, she states that Dumbledore was born in 1881, making him either 115 or 116 at the time of his death.

Gellert Grindelwald

She was eventually killed in a three-way duel between Albus, Aberforth, and Gellert Grindelwald.

Snape is evil: He’s a Death Eater, he has a longstanding grudge against Harry’s father, he’s been nothing but nasty to the boy since his arrival, and he’s generally an unpleasant fellow to be around.