I quote your words in article Parashat Pinchas and God's Zeal, "Judas Iscariot ('Judas the Dagger-man', surnamed after the 'sica' or Roman dagger)"...

AFAIK, the meaning of name of Judas Iscariot in its original Hebrew is "Yehuda Ish-Kariot", or "Yehuda of Kariot"...

There is scholarly discussion about the meaning of the surname "Iscariot." One theory is Ἰσκαριώτης is a Greek transliteration of the Hebrew phrase "man of Keriot" (איש־קריות). Another theory states that Judas (or Judas' father) was a member of the sicarii ("daggers" or assassins among the Zealots) and therefore his surname represented this connection, similar to the designation of Simon as "the Zealot" (ζηλωτής). Since the original New Testament documents were written in Koine Greek, we are forced to attempt to reconstruct the meaning from the Greek, rather than Hebrew text...

Shalom