Harry Potter and the Order of the Phoenix
by J.K. Rowling
We know that Hogwarts student Vincent Crabbe's Death Eater father must have been in the Department of Mysteries at the end of the book because Lucius Malfoy calls him by name. So Crabbe is creating a family tradition: he follows Lucius around the same way his son trails after Draco. Looks like the apple doesn't fall far from the tree.