Shim'on = Simon (Hebrew origin).

Y'hochanan = John (Hebrew origin).

Mattithyahu = Matthew (Hebrew origin).

Ya'aqov = James (Hebrew origin meaning Jacob).

Bar-TÃ´lmay = Bartholomew (Aramaic, which is related to Hebrew).

Judah = Jude / Saint Jude (not to be confused with Judas Iscariot, Hebrew origin).

Yehuda = Judas Iscariot (Hebrew origin, Betrayed Yeshua/Yehosua the Messiah).

Cephas / Kephas = Peter (Hebrew / Aramaic origin meaning "Rock").

Tau'ma = Thomas (Aramaic origin).

Andrew = Andrew (Greek origin. Is the brother of Cephas / Kephas).

Phillip = Phillip (Greek origin).

You will note that there are only 11 names, that is because there were 2 Apostles named Ya'aqov (James), which brings the total to 12 apostles.

As far as who was or could be an Apostle (potentially 15 of them), there are debates on this.