Jesus gives Simon the new name "petros". However he refers to the "rock" as "petra". The inspired New Testament Scriptures were written in Greek, not Aramaic. What Jesus "might" have said in Aramaic is conjecture. In Greek, there is a distinction between the two words, πέτρα being a "rock" but πέτρος being a "small stone" or "pebble". (James G. McCarthy translates the two as "mass of rock" and "boulder or detached stone", respectively.) Jesus is not referring to Peter when talking about "this rock", but is in fact referring to Peter's confession of faith in the preceding verses. Jesus thus does not declare the primacy of Peter, but rather declares that his church will be built upon the foundation of the revelation of and confession of faith of Jesus as the Christ.