From these examples we only see that St. Peter was called Peter by Evangelist Matthew who wrote after the events in Matthew 16.
What is your point? All the Gospels were written after the events in Matthew 16. They were not diaries.
However, the Gospel accounts describe events prior to the Matthew 16 event.
Matthew 8:[14] And when Jesus entered Peter's house, he saw his mother-in-law lying sick with a fever;
Matthew 10:[2] The names of the twelve apostles are these: first, Simon, who is called Peter, and Andrew his brother; James the son of Zeb'edee, and John his brother;
Matthew 14:[28] And Peter answered him, "Lord, if it is you, bid me come to you on the water."
[29] He said, "Come." So Peter got out of the boat and walked on the water and came to Jesus;
Matthew 15:[15] But Peter said to him, "Explain the parable to us."
Mark 3:[16] Simon whom he surnamed Peter;
Mark 5:[37] And he allowed no one to follow him except Peter and James and John the brother of James.
Luke 5:[8] But when Simon Peter saw it, he fell down at Jesus' knees, saying, "Depart from me, for I am a sinful man, O Lord."
Luke 6 [14] Simon, whom he named Peter, and Andrew his brother, and James and John, and Philip, and Bartholomew,
Luke 8:[45] And Jesus said, "Who was it that touched me?" When all denied it, Peter said, "Master, the multitudes surround you and press upon you!"
[51] And when he came to the house, he permitted no one to enter with him, except Peter and John and James, and the father and mother of the child.
He certainly was known as "Peter" prior to your magic "rock" event.