Judas Iscariot the son of Simon (Ἱούδαν Σίμωνος Ἱσκαριώτην).
The correct reading is Ἱσκαριώτου, Iscariot, agreeing in the genitive case with Σίμωνος, of Simon. Render, as Rev., Judas, the son of Simon Iscariot. Iscariot denotes the name of Simon's town: a man of Kerioth. See on Mat 10:5.