See related links.
The Dragon Diaries (genre: Horror/Angst, Characters: Draco M. Rated T. Incomplete)
What's In A Name? (genre: Family, Characters: Draco M. Rated K. Complete)
Deciphering Draco (Characters: Draco M. Rated T. Complete. No genre)
Wizard Rock (genre: Humor. Rated T. Complete. Characters: Draco M.)
Heavy (genre: Angst. Rated T. Complete. Characters: Draco M.)
From First To Last These Seven The Most (genre: Romance. Characters: Draco M. Rated T. Complete.
Lucius Malfoy's son is Draco, and he is a Slytherin. Draco's son is Scropius, and his house is not stated in any of the books.
Draco has one kid. Scorpius Malfoy as mentioned at the end of Harry Potter and the Deathly Hallows when Harry Ron and everyone look up to see Draco standing there with his wife and one son as they were boarding the hogwarts express. Or maybe he has more than one. We don't know.
No, at least never mentioned in any of the books.
Never stated in any of the books.
Draco Malfoy never goes into the Chamber of Secrets at any point in the Harry Potter series. He is not the heir of Slytherin, and he does not speak Parseltongue, which is required to enter the chamber.
No. The three brothers were alive over 700 years before before Draco Malfoy, who doesn't have any brothers. They three brothers were Antioch, Cadmus and Ignotus Peverell.
No. Draco and Hermione were not involved in any romantic relationship and hated one another.Never, except for fanfictions.
Draco Malfoy could never produce a patronus because he didn’t have any happy memories.
Draco Malfoy has one child, Scorpius Malfoy, with Astoria Greengrass, a girl from two years below him in Hogwarts, and the younger sister of his yearmate and fellow Slytherin Daphne Greengrass. Astoria is a Pureblood, and therefore Scorpius is also a Pureblood. Though raised in a Pureblood supremacist family, Astoria changed her views of Muggles and Muggle-Borns during the Second Wizarding War, and raised Scorpius to believe that Muggles and Muggle-Borns are equal. Scorpius's first year at Hogwarts was in 2017.
Not romantic feelings. Draco hated Hermione.
If you read any of the books, you would know that Hermione has never been romantically interested in Draco (or vice versa).
Yes, they're enemies. In their later life, they appear to come to a mutual understanding and are civil to each other.