Isolt Sayre

Isolt Sayre (born c. 1603) was an Irish pure-blood witch. She was the daughter of William Sayre and Rionach Gaunt and wife of James Steward. She and her husband were the founders of Ilvermorny School of Witchcraft and Wizardry.
Isolt Sayre's mother was born into House of Gaunt, a pure-blood family that descended from Salazar Slytherin, one of the four founders of Hogwarts School of Witchcraft and Wizardry. Her father nicknamed her "Morrigan" after his ancestor because of her "affinity of all natural things".
After her death, Isolt became very well known as the founder of one of the most democratic and least elitist of every great wizarding school.
Isolt was a witch of fair complexion, dark hair, and brown eyes.