Pureblood

Pureblood is the term for magical creatures who have a purely or approximately pure magical lineage. This means that there are no humans in their bloodlines, but this is rarely (if ever) true. If families are traced back all the way, many races would have gone extinct had they not married and mated with humans. Since the only way for a family to retain their pureblood status is to marry other purebloods, all pureblood families were related to one another by the 1300s.