Not trying to discourage any discussion here, but this question might be more fruitful if asked at http://www.reddit.com/r/linguistics

The New Testament names were written in the then lingua franca Koine Greek, so John was Ioannes and Paul was Paulus But Gabriel was from Hebrew, and Peter was Petros, which in turn was the translation from the original Aramaic name that Jesus gave him, Kephas, meaning 'rock'.

Jesus was Yeshua, Moses was Moishe. Isaac was Yitzak, Jacob was Yacov.