↑ In Harry Potter and the Goblet of Fire, Chapter 24 (Rita Skeeter's Scoop), Hagrid tells Harry that he hopes he wins the Triwizard Tournament as "It'd show 'em all ... yeh don' have ter be pureblood ter do it." implying that Cedric is a pure-blood.
Plus, it was implied in Harry Potter and the Goblet of Fire that he was pure-blood which could serve to be another factor in his wealthy background. Despite this, Cedric never managed to inherit the fortune of the Diggory family given his untimely death at the hands of Lord Voldemort.
We don't know for sure. We know that Amos Diggory, Cedric's father, was either a half-blood or a pureblood - same for Mrs. Diggory. I, personally, choose to believe that he was a half-blood with a half-blood mother and a pure-blood father.
Cedric Diggory was a spare source of blood Voldemort could have used in his spell to reconstitute a body for himself. Voldemort's spell said 'blood of an enemy', which meant it did not have to be Harry Potter specifically.
Cedric was described as a fifth year in PoA, so he's a sixth year in GoF. He's described as “about seventeen” early in GoF, and he wouldn't have turned eighteen while still in sixth year, so his birthday was early in the school year, and he was about seventeen and nine months when he died.
The REAL Reason the Weasleys Are So POOR (They're CURSED) - Harry Potter Theory
Why did Cedric Diggory become a death eater?
Due to his humiliation in the Triwizard Tournament, Cedric eventually becomes a Death Eater and kills Neville Longbottom. Due to Neville's death, the final Horcrux Nagini was never destroyed, and as a result Voldemort is never defeated, kills Harry and takes over the Wizarding World.
Astoria Malfoy (née Greengrass) (c. 1982 – August 2019) was a British pure-blood witch and a member of the Greengrass family, one of the Sacred Twenty-Eight.
He could be a pureblood or a halfblood. His mother was a breeder of Hippogriffs, which lead to his interest in magical creatures. He couldn't have been a Muggle-born, because he had Horklumps in his bedroom at age seven.
Draco Lucius Malfoy (b. 5 June 1980) was a British pure-blood wizard and the only son of Lucius and Narcissa Malfoy (née Black). The son of a Death Eater, Draco was raised to strongly believe in the importance of blood purity. He looked down on half-bloods and Muggle-borns.
Slytherin was the surname of a pure-blood wizarding family with several notable members, particularly Salazar Slytherin. Salazar was one of the four co-founders of Hogwarts School of Witchcraft and Wizardry and the founder of Slytherin house. He lived in the 10th century.
Albus Severus Potter (b. c. 2006) was an English half-blood wizard, the second son of Harry and Ginevra Potter (née Weasley) and the godson of Neville Longbottom. He was born two years after his older brother James Sirius and two years before his younger sister Lily Luna.
Notes and references. ↑ In Harry Potter and the Goblet of Fire, Chapter 24 (Rita Skeeter's Scoop), Hagrid tells Harry that he hopes he wins the Triwizard Tournament as "It'd show 'em all ... yeh don' have ter be pureblood ter do it." implying that Cedric is a pure-blood.
An interesting fact of note is that despite the ideals that pure-bloods are inherently more powerful wizards, some of the most powerful or particularly adept wizards and witches in the series are in fact either half-blood (such as Lord Voldemort, Albus Dumbledore, Minerva McGonagall, Severus Snape and Harry Potter) or ...
Luna Lovegood is a Pureblood witch, who was sorted into Gryffindor House during Harry Potter's second year at Hogwarts School of Witchcraft & Wizardry.
J.K. Rowling said that Draco had a crush on Hermione Granger, but he doesn't show that, beacuse Hermione was a Gryffindor, Harry's friend, and also a muggle-born. After the Battle for Hogwarts, Draco fell in love with Astoria Greengrass, and they had son Scorpius.
Luna married fellow naturalist Rolf Scamander, grandson of Fantastic Beasts and Where to Find Them author Newt Scamander, considerably later in life than Harry, Ron, Hermione, and Ginny, who all married and started families in their early-to-mid twenties.
Identified pure-blood families include the Blacks, Crouches, Fudges, Gaunts (though this line died out before the beginning of Philosopher's Stone), Lestranges, Longbottoms, Malfoys and Weasleys (but the most recent generation has had half-blood members).
Muggle-born Slytherins existed, but were very rare, as noted insultingly by Scabior the Snatcher. There had also been definite examples of half-bloods sorted into the house, including Tom Riddle, Dolores Umbridge, and Severus Snape.
Despite being a pure-blood, he didn't believe that he was superior to other witches, wizards and Muggles. He had a lot going for him and his well-placed morals were even more impressive if you think about the start that he had in life. Sirius came from a family of pure-blood fanatics.
In death, Cedric proved to be an inspiration to many students at Hogwarts. His death was heartfelt and was tragic enough to cause even those who disliked Harry to believe his claims of Voldemort's return.
Albus and Scorpius cause Cedric to be hoisted into the air: Cedric Diggory is ascending out of the water and seemingly out of the competition. Oh, ladies and gentlemen, we don't have our winner but we certainly have our loser. Cedric Diggory is turning into a balloon, and this balloon wants to fly.
