Is the name Judas Iscariot a first and last name?

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Judas Iscariot was a Jew, and it most unusual for a Jew of the first century to have a surname (Iscariot), although it was common among Romans and Greeks.

John Shelby Spong (Jesus for the NonReligious) points out that Judas is a variant of Judah, highlighting that the man who betrayed Jesus was a Jew. Iscariot seems to be based on sicarii, a Latin word for 'assassin'. Spong believes the character Judas Iscariot is probably a literary creation.