Oliver David Cromwell (b. March 23, 1993) was an American pure-blood wizard and a descendent of the infamous Cromwell family. In his youth, he was considered rebellious by his family for his refusal to accept their archaic views on blood-purity. He later attended Ilvermorny School of Witchcraft and Wizardry and was sorted into Thunderbird House. During his tenure at Ilvermorny, he met and became friends with Ryan Brennan, who was a year ahead of him, and quickly developed a romantic interest in the older boy which would define much of his school years.