New Living Translation
He was speaking of Judas, son of Simon Iscariot, one of the Twelve, who would later betray him.

American Standard Version
Now he spake of Judas the son of Simon Iscariot, for he it was that should betray him, being one of the twelve.

Berean Study Bible
He was speaking about Judas, the son of Simon Iscariot. For although Judas was one of the Twelve, he was later to betray Jesus.

Douay-Rheims Bible
Now he meant Judas Iscariot, the son of Simon: for this same was about to betray him, whereas he was one of the twelve.

English Revised Version
Now he spake of Judas the son of Simon Iscariot, for he it was that should betray him, being one of the twelve.

King James Bible
He spake of Judas Iscariot the son of Simon: for he it was that should betray him, being one of the twelve.

World English Bible
Now he spoke of Judas, the son of Simon Iscariot, for it was he who would betray him, being one of the twelve.

Young's Literal Translation
And he spake of Judas, Simon's son, Iscariot, for he was about to deliver him up, being one of the twelve.

John 6:71 Additional Translations ...