Percy Jackson. In his world, that name carries weight. The weight of numerous quests and prophecies; the weight of his many achievements and losses. His enemies fear that name, many monsters run at the mention of his name; while his friends and allies toast his name and battle prowess, and they are proud to say that they have fought alongside him.
But, countries away, that name was not known. While in America he is famous, in England that name was unknown to most. Those who did know that name didn't know what it meant; they didn't understand the weight one name carried. What they did know of that name was very little.
That all changed when the one person feared in England made an announcement to a school, Hogwarts. It went like this:
"Hello, little wizards and witches! You thought you defeated me, didn't you? Well, too bad, I'm alive. And soon, I will have a powerful ally by my side. Soon I will have an heir, and together, we will rule the world. He is my grandson and his name is Percy Jackson!"