Member of tonight's The Crucible audience posted this photo to Twitter..
Euron Greyjoy's ship is called 'The Silence' because all it's crewmembers have had their tongues removed. Writer Martin describes him as TDH, one eye is covered with a patch - the other is brilliant blue. He also has blue lips(in the books). Once Euron returns to Westeros, he dominates the Greyjoy family which includes his brother Victarion.