Wizards are the term for a group of magically gifted humans. It is both the general term for the magical population and the specific term for the male part, whereas female wizards are called witches.
Magic is genetically hereditary, and, being a recessive gene, it is quite rare.
 Blood Status
See also Blood Purity
Pure-blood is a term for a person whose ancestors are all witches and wizards. However, most pure-bloods will have a Muggle somewhere on their family tree, although they generally deny it. Most pure-blood families are inter-related due to the struggle to maintain blood purity by only marrying other pure-bloods. It is assumed that most Slytherins and Death Eaters are pure-blooded, with a notable exception being Lord Voldemort. By the events of the Harry Potter series, the pure-blood families were in decline. Both Ron Weasley and Draco Malfoy descend from two of the few pure-blood families left. However, the Weasleys are referred to as blood traitors, and their status of being a pure blood is often questioned, especially by the Malfoys.
See also Pure-blood
Half-blood is a term for a person who is born to one magical parent and one non-magical parent. Some examples of half-bloods are Lord Voldemort and Severus Snape. Alternatively half-bloods can have a muggle-born parent and a pure-blood parent, as Muggle-borns are regarded as Muggles by pure-blood fanatics. Harry Potter is an example of this.
See also Half-blood
Muggle-born is a term for a witch or wizard whose parents are both Muggles. There is a lot of prejudice against muggle-borns in the Wizarding World, especially amongst pure-bloods. This dates back to at least the medieval era, as Salazar Slytherin notoriously despised Muggle-borns. Wizards hostile to Muggle-borns use the term Mudblood, which is a derogatory name for a Muggle-born witch or wizard. It is first used in Harry Potter and the Chamber of Secrets by Draco Malfoy of Hermione Granger. The term becomes more clear as it is used more in the series by Draco Malfoy and various Death Eaters.
See also Muggle-born
 Organization Memberships
 Death Eaters
The Death Eaters are a group controlled by Lord Voldemort. Their enemies are the Order of the Phoenix, Dumbledore's Army, and at times the Ministry. The Death Eaters are anti-muggle and racist even though some of the members are half-blood.
 Order of the Phoenix
The Order of the Phoenix is an organization fighting against Voldemort and his Death Eaters. It was founded by Albus Dumbledore during the First Wizarding War and was revived for the Second War. The Order was introduced in Harry Potter and the Order of the Phoenix and has remained an integral part of the books ever since. The Order often comes to Harry's aid during battles and was present at the Battle of Hogwarts and the Battle of the Astronomy Tower. The Order communicates through the use of Patronuses which was taught to them by Dumbledore. Members are required to have left school before they can join.
The Marauders were a group of friends at Hogwarts who developed The Marauder's Map. Remus Lupin was a werewolf, and when his friends learned this, they worked to become illegal Animagi so they could accompany Lupin when he transformed at the full moon without being in danger themselves. James Potter's Animagus was a stag (the same animal his son Harry's Patronus took the form of), Sirius Black's Animagus was a dog, and Peter Pettigrew's Animagus was a rat (which he later used to disguise himself as Ron Weasley's pet rat).
 Dumbledore's Army
Dumbledore's Army was a group of Hogwarts students who wanted to learn Defense Against the Dark Arts from a real teacher since Dolores Umbridge (their Defense Against the Dark Arts teacher for that year) would not teach them any real defensive magic. Harry Potter was the leader/teacher of Dumbledore's Army because he had been able to defend himself against Lord Voldemort the previous year. The group was named Dumbledore's Army because the Ministry of Magic feared that Albus Dumbledore was creating an army to rise up against them. The DA was eventually disbanded when Umbridge discovered them, as they were operating illegally. They also unnofficially return when the Carrows teach at the school and Defense Against the Dark Arts is turned into Dark Arts. Since Harry is not at Hogwarts at the time, they may not of actually taught defense, but they often pulled stints like putting graffiti up on the wall saying "Dumbledore's Army still recruiting."
 External links
 See also
 Names and Families That Need To Be Moved
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