Grindelwald is furious and attempts to kill Credence, but Dumbledore blocks his curse and they fight. After Grindelwald escapes, Credence reunites with his father Aberforth and returns to England with him to spend the remainder of his days in peace, happy to have finally found the family he had been searching for.
But Credence is dying as a result of his Obscurus curse, and it's very likely Aberforth will only get to spend just a short amount of precious time with his son. This is the root of Credence not being mentioned in the Harry Potter series.
In the end, Credence/Aurelius returns to the light, taking sides with his family, rather than Grindelwald. The action has reverberating consequences, as Grindelwald tries to kill Credence, but Dumbledore protects him — breaking their blood pact.
What happened to Aurelius Dumbledore in Harry Potter?
While in search of his true identity, Aurelius heeded Grindelwald's call and joined his army. Dying as his own nature slowly poisoned him, Aurelius renounced his allegiance to Grindelwald and went home with his father, Aberforth Dumbledore.
Grindelwald VS Dumbledore Fight || Scene from Fanatastic Beasts The Secrets of Dumbledore
Is Credence actually Snape?
Fantastic Beasts: The Secrets of Dumbledore confirmed that Credence Barebone/Aurelius Dumbledore (Ezra Miller) is the new Snape (Alan Rickman) through a very familiar line delivered by Aberforth Dumbledore (Richard Coyle). Fantastic Beasts 3 finally shed light on the Credence being Aurelius Dumbledore plot twist.
Born as Bellatrix Black, Bellatrix married into the Lestrange family, meaning she and Leta aren't related by blood. That makes Leta related to Bellatrix's husband, Rodolphus Lestrange, although that connection is no easier to find.
After his encounter with his uncle Albus Dumbledore, Credence managed to send another message to Aberforth at the Hog's Head Inn, saying that he "wanted to come home". The same evening, Aberforth learned from Albus that Credence was his son.
After Fantastic Beasts: The Secrets of Dumbledore: Movie Magic was released, it was confirmed in the book that Credence's phoenix was indeed not Fawkes.
At some time after the end of the Global Wizarding War, Newt and Tina marry. Newt creates the Werewolf Register and the Ban on Experimental Breeding. Newt also works for the Dragon Research and Restraint Bureau. In 1979, he is awarded The Order of Merlin - Second Class for his services to magizoology.
Voldemort was Tom Riddle and Dumbledore met Tom as a child. Riddle also attended Hogwarts. Riddle was also a Jr to his father, Tom Riddle Sr. Nothing lines up with Credence being Tom.
Credence may well be related to Voldemort, but it would have to be through Voldemort's grandmother. That also means the mystery woman must've had a second child: Merope Gaunt, born in 1907. It's entirely possible that Aberforth could have sired a child with Voldemort's grandmother.
At the end of her life, Leta demonstrated her incorruptible spirit and morals by resisting Grindelwald's persuasive speech, and willingly sacrificing her own life to save her beloved friend Newt and fiance Theseus from the lethal black fire.
Although Aunt Petunia and Uncle Vernon were horrible to Harry, especially when he showed any resemblance to magic, the young wizard wasn't aware that he was magical. Harry's ignorance protected him from developing an Obscurus because he didn't develop a shameful attachment to his magic.
Mary Lou Barebone (played by Samantha Morton) is a fanatical No-Maj campaigner against wizardry and the abusive, adoptive mother of Credence, Chastity, and Modesty.
Following Dumbledore's death, Fawkes sang his Lament over the grounds of Hogwarts School of Witchcraft and Wizardry, and then flew away, never to be seen again. His tail feathers were the cores of the two twin wands which were held by Lord Voldemort and Harry Potter.
Grindelwald is furious and attempts to kill Credence, but Dumbledore blocks his curse and they fight. After Grindelwald escapes, Credence reunites with his father Aberforth and returns to England with him to spend the remainder of his days in peace, happy to have finally found the family he had been searching for.
He believed Credence to be connected to the Obscurial due to a vision he received. Believing Credence was an orphaned Squib, Grindelwald emotionally manipulated him into helping him find the Obscurial. He did this with the promise of protecting him from his abusive adoptive mother and teaching him magic.
Although Aberforth was a brother of Albus, he did not study the art of magic as much as Albus did. He cared more for the Dumbledore family than Albus did and abandoned his studies to help them out. He was powerful, but not quite as powerful as Albus.
Aurelius was an illegitimate child of Aberforth's. His mother is killed, and as a result Aberforth is unable to care for his son. Credence is taken to America and put up for adoption, a fact known to no one but Leta Lestrange (Zoe Kravitz).
They were close friends in the wake of not having anyone else. Through it all, even thru her engagement to his brother, Leta still loves Newt. When she's about to attack Grindelwald, she turns and ambiguously says "I love you" at such an angle that it could be to Newt or Theseus.
Narcissa "Cissy" Malfoy (née Black) (b. 1955) was a British pure-blood witch and a member of the noble House of Black. She was the youngest daughter of Cygnus and Druella Black and the younger sister of Bellatrix Lestrange and Andromeda Tonks. She married Lucius Malfoy and they had a son: Draco Malfoy.
