Euron Greyjoy

"I still remember seeing my father's fleet burn in Lannisport. I believe your uncles were responsible."

- Tyrion Lannister to Theon Greyjoy in Season 1.

Euron Greyjoy is a recurring character in Season 6 who was previously alluded to in Season 1. He is portrayed by Pilou Asbæk. Euron is the younger brother of King Balon Greyjoy, older brother of Aeron Greyjoy, and the eldest uncle of Theon and Yara Greyjoy.

Background
Euron Greyjoy is the younger brother of Balon Greyjoy, head of House Greyjoy, Lord Reaper of Pyke and self-fashioned King of the Iron Islands.

Season 1
Tyrion Lannister tells Theon about his memories of witnessing the Raid on Lannisport which Tyrion says was caused by Theon's uncles.

In the books
In the A Song of Ice and Fire novels, Euron is a wildly unpredictable and cruel man, known for his delight in playing vicious mind games and waging psychological warfare on anyone and everyone around him. He is hated by all his brothers, particularly Victarion. He wears a patch over his left eye, which is nicknamed his "Crow's Eye", though it is unclear what he hides beneath the patch. He is captain of the ship Silence, crewed entirely by mutes - to keep the crew from revealing any of his secrets, Euron personally ripped the tongues out of each of their mouths.

Euron has never been married. He has several bastard children, but does not have any regard for any of them, none were officially acknowledged, and none have been introduced in the narrative (it is mentioned in passing that one is a ten year old boy with woolly hair and mud-brown skin, apparently fathered on a woman from Sothoryos or the Summer Islands).

Unlike many ironborn (including Balon), Euron is a cunning strategist skilled at both politics and military tactics. During Robert's Rebellion, following the death of Rhaegar Targaryen, Euron (along with Balon and Victarion) convinced his father, Quellon Greyjoy, to side with the rebels and they launched attacks on the Reach, the lands of House Tyrell. It was later Euron who came up with the battle plan for the surprise Raid on Lannisport during the Greyjoy Rebellion, which burned Tywin Lannister's entire fleet at anchor before it could respond to the ironborn's declaration of independence. Victarion commanded the actual assault itself, following Euron's plan.

Several before the events of A Game of Thrones, Euron raped and impregnated Victarion's third wife, which drove Victarion to beat her to death in an honor killing, so he would not be put to shame as a cuckold. Euron flippantly claimed that it was not rape and he in fact seduced Victarion's wife willingly, but due to Euron's pervasive lying and mind games he may have just said this to mock his brother. Victarion would have killed Euron too, but Balon forbade it, though only because he would not have the taboo of kinslaying in his own halls. Balon still sympathized with Victarion and renounced Euron as his brother. As punishment, Balon exiled Euron from the Iron Islands, never to return, so he is not present when Theon returns to Pyke in A Clash of Kings. Victarion still deeply hates Euron and wishes him dead. In A Storm of Swords, however, Robb Stark hears that Euron has violated Balon's ruling and returned to the Iron Islands. Euron first appears in person in A Feast for Crows, and makes a proposal for House Greyjoy's next move in response to Tywin Lannister's death and the weakening of House Lannister.

Euron's actions also made him very unpopular with the Drowned Men priests, who deride him as an "ungodly" man. There aren't many things that the Drowned God religion won't stand for - given that it considers raiding and pillaging to be holy acts - but raping your own brother's wife is one of them.

After being banished from the Iron Islands, Euron sailed his ship far to the east raiding and plundering as an infamous pirate, and he claims to have sailed to the far corners of the known world where other men fear to venture, from distant Asshai to the smoking ruins of Old Valyria. While in the east he picked up the habit of drinking Shade of the evening, like the Warlocks of Qarth, and as with the warlocks the potion has stained his lips blue.

"Euron" is pronounced "Your-on".