Harry is very distantly related to Salazar Slytherin, but is not a descendant of him, as Voldemort is descended from Slytherin, and the second Peverell brother, while Harry is a descendant of the third.
Although it was briefly speculated in Chamber of Secrets, Harry is not, in fact, a direct descendant of Salazar Slytherin, though he is a distant cousin of Lord Voldemort, as both are descended from the Peverell family. Slytherin built the Chamber of Secrets to allow his heir to purge the school of Muggle-borns.
In the Chamber itself, we see a large statue of a wizard, which Harry presumes is Salazar Slytherin. We also meet Tom Riddle, who is, as it turns out, the heir of Slytherin. Present only in spirit, he has all the same been controlling Ginny, and having her act as Slytherin's heir.
No, Harry is not descended from Godric Gryffindor, but rather is descended from the Peverell brothers of The Tale of the Three Brothers and owners of the original hallows on his father's side.
See, Voldemort, borne of the old pure-blood family called the Gaunts, is a descendant of Slytherin through Cadmus Peverell, one of the brothers responsible for the birth of the Deathly Hallows. This means that all three Peverell brothers must have been descendants of Slytherin.
Harry James Potter holds half-blood status in Rowling's imagined wizarding world because his mother is Muggle-born and his father is pure-blood. There are three main blood statuses; pure-blood, half-blood, and Muggle-born, which are all methods of determining a witch or wizard's magical lineage.
Harry is the Heir of Gryffindor (though his powers have been bound by his father when he was a baby), Neville is the Heir of Hufflepuff, Meghan (OFC, daughter of Sirius) is the Heir of Ravenclaw. Harry/Ginny, Ron/Hermione, Remus/Tonks. Sixth year. After a rare magical illness Harry becomes outstandingly powerful.
Andrea Deanisi as Wiglaf Sigurdsson, the Heir of Rowena Ravenclaw.
Her real parents were Daneel and Dean Novak, Pureblooded wizards. Turns out Daneel was Tom Riddles younger sister, Daneel Riddle. Of course, the Riddles were related to Salzar Slytherin himself, and this made Hermione the living heir of Slytherin. The problem with being a female Slytherin heir, is that they're cursed.
In addition, Lucius Malfoy and Arthur Weasley have a well-established feud despite being second cousins once removed by marriage.
The Heir of Slytherin turns out to be Ginny Weasley, who is being controlled via a magical diary that once belonged to Tom Riddle, AKA Voldemort.
The Heir of Hufflepuff was a person foretold by the Seer Harmonthrep (Ajrand) to bring great glory and honor to the House of Hufflepuff, considered boring and lackluster by most.
Myth 6: the Malfoys are heirs of Slytherin
So it's a surprise to find out Malfoy's as confused as everyone else. The only thing he is heir to is his family name, and as his father doesn't see fit to tell him about plans their house-elf Dobby is aware of, it seems he has a way to go yet…
Godrick Gryffindor, one of the four founders of Hogwarts, and the owner of the legendary Sword of Gryffindor, was absolutely more powerful than Dumbledore— and it's a good thing he was, too, because Dumbledore wasn't around in Hogwarts' early days to keep Godrick's fellow founder Salazar Slytherin in check.
Slytherin doesn't mean evil! Some Slytherins have avoided becoming the worst of the worst. The question of what makes a Slytherin not fully evil essentially amounts to whether they embraced wizard fascism or not, either by following Lord Voldemort or pursuing purist policies in government.
Albus ended up in Slytherin because he couldn't stop thinking about ending up in Slytherin, and so the Sorting Hat couldn't grasp anything other than his thoughts about being in Slytherin.
In Harry Potter canon, Ginny is Sorted into Gryffindor, while Prince of Slytherin's Ginny is Sorted into Slytherin.
And this is why Hermione does not fit into Ravenclaw, since she lacks their creativity of thought. When you also add in her fearlessness and her strong convictions about right and wrong, which are inherently Gryffindor traits, then there was even less of a chance she'd end up wearing blue and bronze.
She is perceptive
Ravenclaws are perceptive, and Luna noticed all kinds of things others didn't during her time at Hogwarts. There was that time she explained Ron in one sentence: 'He says very funny things sometimes, doesn't he?
Moaning Myrtle
Born in the late 1920s to Muggle parents, Myrtle Warren started her Hogwarts life in the early 1940s, where she was sorted into Ravenclaw. She had no friends, and was bullied relentlessly because of her glasses and acne. But she would soon have all of eternity to get her own back.
Peter Pettigrew represents the worst Gryffindor in the entire Harry Potter series. Wormtail, as he was known among his friends, was thought to be a friend of the Marauders and a member of the Order of the Phoenix, but he was secretly working for Voldemort and committed the ultimate act of betrayal in the series.
The lightning bolt scar that was so vibrant in the first films has almost completely disappeared. The scar is no longer dark, and instead has faded almost to his usual skintone. Scars do fade with time, but J.K Rowling wrote in the book that: "The scar had not pained Harry for nineteen years. All was well."
Their names were Godric Gryffindor, Rowena Ravenclaw, Helga Hufflepuff and Salazar Slytherin.