Claus von Bülow (born Claus Cecil Borberg; 11 August 1926 – 25 May 2019) was a Danish-British socialite.
He was known for being accused of the attempted murder of his wife Sunny von Bülow in 1979 which had left her in a coma from which she never recovered. However, that conviction in the first trial was reversed and he was found not guilty at his second trial.
In the same trial he was also convicted for the attempted murder of his wife by insulin overdose in 1980 which left her in a persistent vegetative state for the rest of her life, but that conviction in the first trial was also reversed and he was found not guilty at his second trial.
He was a friend and personal assistant to J. Paul Getty.
The characters Klaus and Sunny Baudelaire from A Series of Unfortunate Events are named after Claus and Sunny von Bülow.
Bülow died in London on 25 May 2019 at the age of 92.