Denin Praygun (c. 1960) was a Pureblooded Wizard that attended Hogwarts School of Witchcraft and Wizardry from c. 1971-1978 and was sorted into Hufflepuff. Denin married Pureblooded Witch Enthusia Untioann sometime between 1977-1980, and had their first child, Jiskimia in 1978, their two other children, Tiaicia and Fegas following in 1979 and 1980, respectively.
Denin was a member of the first Order of the Phoenix, and fought alongside them in the First Wizarding War. He earned good enough marks in his exams to qualify for Auror training when he left school in 1978. This means that he presumably took Defence Against the Dark Arts, Transfiguration, Charms, Potions and another subject at sixth and seventh year, and earned Exceeds Expectations or Outstandings in all of them for his Nastily Exhausting Wizarding Tests. He became a full-fledged Auror in 1981, and was Head of the Auror office from 1987-2007.