I came across this in The Age, Melbourne:
"Claim on Hogwarts castle
LONDON
November 22, 2009
The Duke of Northumberland, whose ancestral seat, Alnwick Castle, is the setting for Hogwarts school in the Harry Potter films, is facing a challenge to his title.
Kevin Percy, a New Zealander, insists he is the rightful heir to the estate. He has written to the Queen seeking her support to exhume the 5th Earl of Northumberland, who died in 1560, to see if the remains match his DNA.
Ralph Percy, the 12th Duke of Northumberland, is confident he will see off the challenge to his 50,000-hectare estate.
Kevin Percy, 74, believes his family was cheated out of the title"
Another reason for getting your DNA analysed?
John