In Arthur Conan Doyle’s Sherlock Holmes story “The Adventure of the Three Garridebs,” the American claimant’s first name is John.
John Garrideb arrives in London claiming that an eccentric millionaire, Alexander Hamilton Garrideb, has left a fortune to three men who share the unusual surname Garrideb. He says the inheritance depends on finding a third Garrideb.
The supposed opportunity is a criminal deception designed to remove Nathan Garrideb from his rooms. John Garrideb is actually James Winter, a criminal who wants access to a hidden tunnel and believes valuable banknotes are stored nearby.
The story is especially notable for Watson’s injury. Winter shoots Watson, and Holmes reacts with unusual emotion because he fears his friend may be seriously hurt. The episode demonstrates both Holmes’s close attachment to Watson and the danger behind an apparently absurd inheritance puzzle.