Harrison Thornblake and The Boy Who Lived

(I suck at summaries, so here I go)Imagine a world where Harry is three years older than his younger brother Aaron who is the Boy Who Lived, and is abandoned until he finds a family named Thornblake and goes to a different school for six years at Thornblake Academy of Enchantment and Magic. At his seventh year, he finds his family and competes with his brother for the Triwizard Cup