25Slytherin's Descendant Founded Ilvermorny
She wanted to create a school as she had never been able to attend Hogwarts, but had grown up hearing about it from her (crazy) aunt, which brings us back to Slytherin’s hatred of muggles.
Unfortunately, Salazar Slytherin’s hatred of muggles did not die with him. But I’m getting ahead of myself. One of Slytherin’s descendants, Isolt Sayre, an Irishwoman, ended up in North America, and went on to found the American school of witchcraft and wizardry, Ilvermorny.
Isolt’s aunt took out her
parents because she saw how they interacted freely with muggles, and was terrified her niece would grow up and marry a muggle, and thus tarnish the bloodline. When Isolt was old enough, she escaped to America, and went on to found the school.