Lucius Malfoy (born in 1954) is a pure-blood wizard, the husband of Narcissa Black, and the father of Draco Malfoy. Lucius is an aristocratic man and Death Eater, and as such has an obsession with blood purity; he presumably indoctrinated his son Draco with the same ideals. The Malfoy family was initially loyal to Lord Voldemort during the First and Second Wizarding Wars, but defected at the conclusion of the latter.
Lucius was born in 1954, and was the son of Abraxas Malfoy and his wife. In 1965, he began attending Hogwarts School of Witchcraft and Wizardry and was sorted into Slytherin house. While at Hogwarts, he was made a Slytherin prefect. At some point after his time at school, he married Narcissa Black; their son Draco was born in 1980.
Lucius eventually became a Death Eater, one of the followers of Lord Voldemort, but abandoned that side after the Dark Lord's first fall in 1981. Lucius claimed he had been bewitched by Voldemort through the Imperius Curse and had not meant to serve him. Though this explanation was accepted by the Ministry of Magic, some, such as Arthur Weasley, believed it was a lie. Lucius then went on to get a job at the Ministry of Magic as a school governor of Hogwarts.
Lucius knew Igor Karkaroff, headmaster of