A person from Stockholm was visiting London, where he thought he had no relations, or that if there were any relations, they were perhaps a century ago. And while walking in a part of London he met someone who called him by his name. When he turned back, this person excused himself saying, "I am sorry, I have made a mistake." But this man asked, "How did you know my name? The name you said is mine." And when they spoke together they found that they were cousins, but cousins only if they studied genealogy.