[DSHambone]

We don't know for sure whether the Gospels were written first in Aramaic or not, or for that matter whether Jesus and the Apostles spoke to each other or to the Jewish crowds in Aramaic. Greek was the Lingua Franca of the Middle East since the time of Alexander the Great. We have no manuscripts going back prior to the Greek, so it's all speculative as to what might have preceded what we have.

Continuing on with your train of though - we don't know for sure - that Jesus was the Son of God....got to have some faith here!
But dollars to donut holes that Jews speaking familarly with each other did not use Greek, but use a Hebrew/Aramaic dialect.

[austen]

You are correct -- we know that Jesus spoke in Aramaic from Mark 15:33 ("Eloi, Eloi, lema sabacthani"). He almost certainly spoke Hebrew as well, but there is no evidence that he spoke Greek. Peter is Cephas.