Mark 3:16

16 These are the twelve he chose: Simon (Jesus gave him the name Peter);

Mark 3:16 Meaning and Commentary

Mark 3:16

And Simon he surnamed Peter.
] Or Cephas, which signifies a rock, or stone, because of his courage and constancy, his strength and fortitude, steadiness and firmness of mind: this name was imposed upon him, not at the time of his mission as an apostle; nor when he made that noble confession of his faith in Christ, as the Son of the living God, at which time this name was taken notice of; but when Christ first called him to be his disciple and apostle; see ( John 1:42 ) .

Mark 3:16 In-Context

14 and he chose twelve, whom he named apostles. "I have chosen you to be with me," he told them. "I will also send you out to preach,
15 and you will have authority to drive out demons."
16 These are the twelve he chose: Simon (Jesus gave him the name Peter);
17 James and his brother John, the sons of Zebedee (Jesus gave them the name Boanerges, which means "Men of Thunder");
18 Andrew, Philip, Bartholomew, Matthew, Thomas, James son of Alphaeus, Thaddaeus, Simon the Patriot,
Scripture taken from the Good News Translation - Second Edition, Copyright 1992 by American Bible Society. Used by Permission.