How did the Aramaic name Kepha become Peter in the New Testament?

The Aramaic name Kepha (often transliterated as Cephas) means "rock" in Aramaic. In the New Testament, which was written in Greek, this name was translated to the Greek word Petros, which also means "rock".12

The transition occurred because Jesus gave Simon the title of Kepha to signify his role as a foundational figure for the community of the faithful. When the Gospels were recorded in Greek—the language of administration and trade in the eastern provinces of the Roman Empire—the name was rendered as Petros to preserve the meaning of the original Aramaic title. This Greek name eventually evolved into the Latin Petrus and the English Peter.132