Mr Montague was the father of Graham Montague. He and his wife, Mrs Montague, visited Hogwarts School of Witchcraft and Wizardry after their son was finally freed from a prolonged entrapment inside a Vanishing Cabinet in 1996 by Fred and George Weasley. Harry Potter, Ron Weasley, and Hermione Granger saw them arrive at the school looking furious through the window of the Charms classroom.