Professor Jonathan Everett Barlow (b. 23 June, 1962) was an American half-blood wizard who attended Ilvermorny School of Witchcraft and Wizardry and was sorted into Horned Serpent house. After graduating from Ilvermorny, he served as an Auror for the Magical Congress of the United States of America between 1982 and 1994. He later returned to Ilvermorny, where he became the Defence Against the Dark Arts professor and the Head of Horned Serpent House.
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