An Ancient Ancestor of Magicals
Black Family?
Or Founder of another?
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Born in Ancient Magical Earth, 10,000 BCE?
Era of the Gods?
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Reached Great Heights
Effectively Immortal
Magical Circuits, Purification of Blood
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10th Century:
Founding of Hogwarts - Role?
Pervious Owner of the Castle?
Father or Teacher of one of Founders? - Preferably Rowena Ravenclaw
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20th Century:
Created a shop near the border of Knockturn and Diagon Alley
Prestigious among Pure-Blood for the 'services' provided.