When the final Harry Potter book came out in 2007, Potterheads everywhere were pretty bummed their fave magical story was ending forever. But they quickly learned they had nothing to worry about because J.K. Rowling has kept the series alive through spinoffs like Cursed Child and Fantastic Beasts and revealing tons of secrets about the wizarding world on Pottermore and Twitter.
Apparently, the Potter line started with an eccentric wizard named Linfred of Stinchcombe who originated Skele-gro, the very potion that fixed Harry's arm in Chamber of Secrets. But the most fascinating tidbit from the Potter history: The Harry Potter we know and love today wasn't the first Harry Potter. Harry's great-grandfather was named Henry Potter, but to his close friends, he was Harry.
Harry's great-grandfather rocked the boat just as much as Harry did in his time. According to Rowling's history of the Potter clan, he caused a stir when he publicly condemned the then-Minister for Magic, Archer Evermonde, for forbidding the magical community to help Muggles during the First World War.
His outspokenness on behalf of Muggles was pretty much why the Potters were excluded from the Sacred Twenty-Eight—the 28 British families that were still "truly pure-blood" by the 1930s.
So defending the defenseless runs in Harry's blood! MIND. BLOWN.