You are not entirely correct about that.

"Controversy has surrounded one particular text that is linked with the Aramaic nickname name כפא (Cepha), meaning "rock," that Jesus gave the man previously known as Simon.[John 1:42] The Greeks translated it as Πέτρος (Petros), a new form, appropriately masculine, of the standard feminine word πέτρα (petra), also meaning "rock;" and the Latins translated it as Petrus.[4]

While the reasons for disagreement on the nature of the primacy are complex, hinging on matters of doctrine, history and politics, the debate is often reduced to a discussion of the meaning and translation of Matthew 16:18: "And I say to thee: That thou art Peter; and upon this rock I will build my church, and the gates of hell shall not prevail against it." Matthew 16:18, Douay-Rheims Bible

In the Greek text, the new name given is Πέτρος (Petros), and in the second half of the same verse the word translated as "rock" is πέτρα (petra). A literal translation, in the style of the King James Version, of the words presumably used by Jesus would be "Thou art Rock, and upon this rock will I build my church".[5] To preserve a supposed pun, the Greek text chose to translate Peter's name as "Πέτρος" rather than as "Κηφᾶς" (Cephas).

One common Protestant argument historically has been that the translation from the New Testament in Hebrew into Greek is tenuous at best as there is no real evidence or indication that the New Testament (in Greek) was ever translated from Hebrew or Aramaic texts; for that argument see Aramaic primacy. According to the Protestant transliteration argument,[citation needed] in the language that Jesus spoke, the same word, כפא (cepha), was used for both Peter's name and for the rock on which Jesus said he would build his church. Since the Protestant Reformation, many non-Catholics have challenged the Catholic Church's position, questioning whether the feminine πέτρα refers to Peter, and claiming it may instead refer to either Peter's confession of faith or to Jesus himself.[6][7] "