Mark 3:16

16He appointed the twelve: aSimon (to whom bhe gave the name Peter);

John 1:42

42He brought him to Jesus. Jesus looked at him and said, You are Simon the son of cJohn. You shall be called dCephas (which means ePeter
 Cephas and  Peter are from the word for rock in Aramaic and Greek, respectively
).

Copyright information for ESV