The Malfoys are related to the Black family through Narcissa (a first cousin of Sirius Black, Harry's godfather), which makes Draco a nephew of both Bellatrix Lestrange and Andromeda Tonks. Draco is also Nymphadora Tonks' first cousin through their mothers.
Sirius' family tree includes some nefarious characters. Bellatrix Lestrange, Narcissa Malfoy, and Sirius Black are all descendants of Pollux Black, making them first cousins. Note: For space's sake, this tree doesn't include Andromeda Tonks or her husband and daughter.
Sirius Black is not the uncle of Draco Malfoy. You say yourself that Draco's mother Narcissa (née Black, by the way) and Sirius were cousins – first cousins, in fact. That makes Sirius and Draco first cousins once removed.
Bellatrix is a member of the Black Family and is the cousin of Sirius Black. Bellatrix is the daughter of Cygnus and Druella Black and sister to Andromeda (mother of Nymphadora Tonks) and Narcissa (mother of Draco Malfoy).
He is seen in his animagus form by Lucius Malfoy while on Platform 9 3/4. Lucius, as a Death Eater, knows about Sirius' animagus form because Peter Pettigrew told the Death Eaters when he returned to their side after book 3.
He rejected his family's pure-blood elitism and reverence for the Dark Arts. At Hogwarts, rather than be sorted into Slytherin like the rest of his family, Sirius was placed in Gryffindor. In contrast to his home life, Sirius greatly enjoyed life at Hogwarts, where he was inseparable from his best friend, James Potter.
Yes he did. Snape explicitly tells this to Sirius in Order of the Phoenix. The real question is how he could possibly recognise him.
As other people said, it is also due to the Malfoys' arrogance, the feeling of self-importance and wealth. The Weasly family is also very poor, which may also lead to a dislike with the rich, pureblood families.
Draco had several reasons for lying to Bellatrix, including the fact that he was never a bad person. Moreover, he no longer found working for the Dark Lord appealing and hated how Voldemort treated his family. He did not intend to harm anyone and believed Harry was the only person capable of defeating Voldemort.
The biggest revelation in Harry Potter and the Cursed Child was that Lord Voldemort had a daughter with Bellatrix Lestrange, who was named Delphini.
Blaise Zabini was a student in Harry Potter's year at Hogwarts School of Witchcraft and Wizardry. He was a student in Slytherin and was part of Draco Malfoy's gang of bullies. He appeared in Harry Potter and the Half-Blood Prince and Harry Potter and the Deathly Hallows: Part 2.
The Malfoys are related to the Black family through Narcissa (a first cousin of Sirius Black, Harry's godfather), which makes Draco a nephew of both Bellatrix Lestrange and Andromeda Tonks. Draco is also Nymphadora Tonks' first cousin through their mothers.
Harry Potter Musical. Starkid's "A Very Potter Sequel." So it turns out that Dobby was Draco's real father.
Narcissa Malfoy's Very Dangerous Lie
But she was also a mother, which meant she was willing to risk everything to make sure her son was safe. When Harry survived Voldemort's Killing Curse for the second time, Narcissa pretended he was dead so she could get to Draco.
Not knowing whether Draco was alive or dead, Narcissa chose to lie to the Dark Lord rather than risk losing her son. When Voldemort asked her to check if Harry was dead and she realised he was, in fact, still breathing, Narcissa seized her opportunity.
She helped Harry because she believed he could win and that if she did that her son would be safe and that was all she cared about in the end.
Bellatrix Lestrange Killed her own cousin, Sirius Black: She killed Sirius (who was her cousin) during the battle at the Department of Mysteries. She was remorseless and was cackling in glee after she had murdered Sirius.
Bellatrix used a powerful "love potion" on Voldemort and they have sex while he is temporarily obsessed with her. She then uses obliviate on him while he sleeps (you know, he falls asleep after his post-sex cigarette) and tells everyone that the baby is her and her husband's.
Ultimately, his need to survive and protect his family would lead Lucius to betray Voldemort. With the Dark Lord defeated, he and his wife Narcissa turned in every Death Eater they could to avoid being imprisoned in Azkaban.
Lucius Malfoy had a strong dislike of Albus Dumbledore. This is due to two reasons – Dumbledore believed in Muggle rights which contradicted Malfoy's pure blood beliefs. In addition, Lucius was a Death Eater, so he believed that Lord Voldemort was a much more powerful wizard than Dumbledore.
In the battle that ensued, the prophecy was destroyed, and Lucius and his comrades were imprisoned in Azkaban in 1996. Although Voldemort broke them out of prison in 1997, he was displeased with Lucius for his failures and treated the Malfoys with much disdain and abuse.
It proves that Snape cares deeply for the Malfoy family, going as far as offering his help by way of an Unbreakable Vow. What can we learn from this about Snape's loyalties, then? It says that, no matter what side he is on, one thing is clear: Snape is very loyal to his friends.
Sirius Black is Harry's godfather. Sirius is also a convicted murderer of thirteen people and a confirmed Death Eater. Except, of course, as we discover in Book 3, Sirius has actually been framed by his one-time friend, Peter Pettigrew.
His prized possession during childhood was his flying motorbike. Sirius was an animagus and was able to transform into a big black dog, (a Grim) which is an omen of death, at will. He, along with James Potter and Peter Pettigrew became Animagus to help Remus Lupin with his transformations.
Sirius is the 'closest thing' to a parent that Harry has: he's the first person Harry thinks to write to when in trouble, he turns to him for reassurance and support in times of moral dilemma (such as when he witnessed Snape's worst memory), he trusts him within a few hours of meeting him.