Is it possible to obliviate yourself selectively so that you lose all knowledge of your own name?
In Quirrell’s case, he may be a powerful enough Occulumens to prevent the Map from reading his mind and so learning his name (if your theory is correct).
In Quirrell’s case, he may be a powerful enough Occulumens to prevent the Map from reading his mind and so learning his name (if your theory is correct).