She was born in March of 1998 at Malfoy Manor, shortly before the Battle of Hogwarts. As Bellatrix and Voldemort were both killed in the Battle and Bellatrix's husband Rodolphus was imprisoned at Azkaban, Delphi was raised by Euphemia Rowle, a Death Eater.
Euphemia Rowle took Delphi in and raised her, allegedly only because she was offered a substantial amount of gold. According to Delphi, Rowle was not fond of her.
This is a great explanation and is exactly how I saw Voldemort when I first read the books (long before Cursed Child). He allegedly conceived her with Bellatrix in the months leading up the months final battle. Basically Delphi was born shortly before the trio got caught by the snatchers and brought to Malfoy Manor.
Therefore Harry would be considered only 'half' wizard, because of his mother's grandparents." Delphini's paternal grandfather, Tom Riddle Senior, was a muggle, so she is a half-blood.
The Delphinus connection explains why Delphini has such a strange hair color, as Alpha Delphini appears to have a blue and white hue when observed in the sky and Delphini has blue and silvery grey hair.
How and WHY Did Voldemort and Bellatrix Have a Child? - Harry Potter Theory
Is Delphi Diggory related to Cedric Diggory?
She meets young Albus Potter and leads him to believe she is the niece of Amos Diggory, and cousin to the long-dead Cedric Diggory. But in the play's third act, Delphi reveals herself to be the daughter of Voldemort and Bellatrix Lestrange. Fans were shocked, to say the least.
When Harry found out about Delphi's existence, he postulated on whether or not she was a Horcrux. While she is not, technically-speaking, an actual Horcrux, she somewhat functions as one. While she lives, Voldemort's memory lives on.
After Lord Voldemort's final defeat, Rodolphus was imprisoned in Azkaban once more. In 2020, he escaped from Azkaban once again, and set to look for Voldemort and Bellatrix's illegitimate daughter, Delphini, informing her of her destiny and heritage.
Delphini's full name is unknown, and she's never officially used the surnames Lestrange or Riddle in canon. However, she does take on the alias of Delphini Diggory as part of her plot to bring back her parents.
The boys ended up letting Delphini down, which meant she needed to take matters into her own hands. Upon tricking the boys into giving her the time-turner, Delphini would show off her evil nature for the first time, killing a Hogwarts student and forcing the boys to aid her in her time-traveling plan.
Lord Voldemort had no wife he and Bellatrix just made a baby together. Voldemort couldn't love anyone. But the girl mother (In cursed child) is Bellatrix Leatrange.
It is assumed Bellatrix was at least initially drawn to Lord Voldemort because they both believe in an ideology that favors pure-blood wizards and witches over other members of the community. This elitism, shared by the Malfoy and Lestrange clans, was instilled in Bellatrix since childhood.
Notably, Voldemort appeared to be entirely unaware of this split, as he later created a seventh Horcrux in his quest to have six, and continued to target Harry Potter despite him now holding part of Voldemort's own soul.
Harry Potter and the Cursed Child unearthed many revelations but none were as shocking as the introduction of Lord Voldemort's daughter, Delphini. The young Dark witch, nicknamed Delphi, was the product of Voldemort's romantic relationship with Bellatrix Lestrange.
Delphini is the main antagonist, being the child of Bellatrix Lestrange and Tom Riddle (Voldemort). She poses as one of Cedric Diggory's cousins who wants to use a Time Turner (seen in Prisoner of Azkaban) to go back and save him (he died in the Goblet of Fire). Why is Delphi's last name Diggory?
Mason Riddle is the Son of Tom Marvalo Riddle, otherwise known as Lord Voldemort, and the only American student at Hogwarts School of Witchcraft and Wizardry.
In the play "Harry Potter and the Cursed Child," which has become part of "Harry Potter" canon, it was revealed that Bellatrix conceived a child with none other than Lord Voldemort.
During the final battle, Bellatrix was the last Death Eater standing. She was eventually killed in a duel by Molly Weasley after her attempted murder of Ginny Weasley. Before her death, Bellatrix secretly gave birth to an illegitimate daughter named Delphini, whom she conceived with her beloved master, Lord Voldemort.
He felt nothing for his family, and only wanted his friends in school to rally around him because he wanted to hold power over them. Bellatrix Lestrange was obviously in love with him and worshiped him, but he only cared for her servitude, not her. We know that he did not date anyone, even when at Hogwarts.
Delphini "Delphi" Diggory is Voldemort's secret daughter (wow, the Potterverse is turning into a soap opera). She wants to resurrect the Dark Lord—not necessarily to bring evil to the world, but just because she wants to meet her dear ol' dad. It's actually kind of sweet…in a completely evil way.
Why didn't Bellatrix make a horcrux? - Quora. Because her life goal was just to please the dark lord. Not immortality, but to live out her life committed to Voldemort, doing whatever he says. Of course, there is also a possibility that she didn't know about horcruxes.
This is proven by the fact that he didn't even suspect she had a Horcrux. Lucius was given one to smuggle it to Hogwarts under Voldemort's supervision but Bella was given the Cup for the sole purpose of protecting it because he trusted her.
