10Sacred 28 Family
While it's no secret that the Weasley's are a Pureblood family (descended from a long line of witches and wizards), their pedigree is more impressive than is realized. According to Rowling's Pottermore website, according to an anonymous registry made in the 1930s, the Weasley's are considered
one of the oldest Wizarding families in all of England. These 28 families were referred to as the "Sacred 28", and gave Voldemort a recruiting list to pick from for his Death Eaters. While the Weasley's would view such a list as unimportant at best, it's still remarkable to see just how long magic has been in their family.