Here are just a few scholarly works about the origins of the Gospel of Matthew in Syriac.
http://bit.ly/thDNux
http://bit.ly/w3xpae
http://bit.ly/vVnKHS
http://bit.ly/rWQbiT
http://bit.ly/ujCWcZ
Kepha is transliterated into the Greek as Cephas.
http://www.qbible.com/aramaic-new-testament/matthew/16.html#18
What a stretch...There is no Aramaic original and the Syriac was copied from the Greek, not into it...
And then it says the Hebrew supports the Syriac...
I think you are stepping off the deep end by calling these scholarly...