Not A Potter

Harry Potter was the younger brother to Henry Potter- the boy who lived. Neglected by his parents since he could remember, he still tries to make them proud. When the goblins perform their centennial vault inspection and students at Hogwarts are required to make an ancestry potion, what will be discovered? (AU, OOC Snape, Lily, James, Harry, containts Self-Harm and Suicidal themes)