2 May 1998
Mrs. Aldermaston (mother)
Dennis Aldermaston was a Ravenclaw student at Hogwarts School of Witchcraft and Wizardry in the 1990s. He was usually seen spending time at the Library during the 1996-1997 school year.
Preferring to work with Rubeus Hagrid, Dennis didn't like to study. His hero was Gilderoy Lockhart. In 1996 he wanted a new broomstick, which he hoped to receive from his mother at Christmas. At some point in his life, he used Skiving Snackboxes.He participated in the battle of Hogwarts fighting against several death eaters but he was subject to a killing curse and died