Prewett family

"No one lived after he decided ter kill 'em, no one except you, an' he'd killed some of the best witches and wizards of the age - the McKinnons, the Bones, the Prewetts - you were only a baby an' you lived"

- Hagrid and Harry

Prewett is the surname of a pure-blood wizarding family. They are related to the Black, Weasley, and Macmillan families. With the deaths of Fabian and Gideon in the First Wizarding War, the Prewett family became extinct in the male line , though it continues in the female line through the children of Molly Weasley née Prewett

Some members of the Prewett family would likely be labelled "blood traitors", as they were members of the Order of the Phoenix and did not believe in the ideology of blood purity. However, the attitude of the prejudiced House of Black towards the Prewetts suggests that not all members would be considered blood traitors. Lucretia Black was not disowned for marrying Ignatius Prewett, implying that the Prewetts were more accepted in elite pure-blood circles than a family like the Weasleys.

It is unknown whether Molly's second cousin (a squib accountant) is a Pure-blood or not; he could have a muggle mother.

Family Members

 * Mr. Prewett — father of Molly, Gideon and Fabian
 * Mrs. Prewett — mother of Molly, Gideon and Fabian
 * Fabian Prewett — member of the First Order of the Phoenix, brother of Molly and Gideon
 * Gideon Prewett — member of the First Order of the Phoenix, brother of Molly and Fabian
 * Molly Weasley née Prewett — sister of Gideon and Fabian, wife of Arthur Weasley, mother of the Weasley children
 * Ignatius Prewett — brother of Mr. Prewett and uncle of Molly, Gideon, and Fabian
 * Lucretia Prewett née Black — wife of Ignatius and aunt of Sirius and Regulus Black

Possible Relations

 * Bilius — a brother or brother-in-law of Molly Weasley née Prewett
 * Tessie — a great-aunt of Ron Weasley and his siblings, it is unknown if she is an aunt of Molly Weasley née Prewett or of Arthur Weasley.
 * An uncle of the Weasley children who attended Bill Weasley and Fleur Delacour's wedding in 1997, he may be a brother of Molly Weasley née Prewett, or one of her brothers-in-law.
 * Muriel's mother is a grandmother of Molly and her brothers because Muriel is their aunt, and a sister of one of their parents.
 * Muriel — an aunt of Molly Weasley née Prewett, thus a sister or sister-in-law to Mr. or Mrs. Prewett. While Muriel is Molly's aunt, and thus related to the family, it is not confirmed as to whether she is a Prewett.

Family Tree
Prewett      Arcturus Black III ┬ Melania Macmillan ┌─────────┴─────────┐         ┌────────┴────────┐                 │                   │          │                 │       Mrs. ┬ Mr.              Ignatius - Lucretia           Orion ┬ Walburga Prewett │ Prewett          Prewett     Black             Black │  Black │                                                      │       ┌─────┴───────────────┬────────────┐                 ┌────────┴────────┐       │                     │            │                 │                 │     Molly ┬ Arthur       Gideon       Fabian            Sirius            Regulus Prewett │ Weasley     Prewett      Prewett           Black              Black │          │      Weasley family

Etymology
The surname Prewett is Welsh in origin. It is derived from the Middle English word prou, meaning "brave" or "valiant", and the suffix "-et", which implies smallness. Thus, it is believed to be derived from a nickname for someone small, but brave.