The Three Garridebs (1937)

Sherlock Holmes receives a letter from a Nathan Garrideb of 136 Little Ryder Street, asking for help in a most peculiar quest. He is looking for another man with his unusual surname, for it will mean a $5 million inheritance for him. He has been approached by another man, John Garrideb of Kansas, who says that he needs to find others with the same last name.