[15] When therefore they had dined, Jesus saith to Simon Peter: Simon son of John, lovest thou me more than these? He saith to him: Yea, Lord, thou knowest that I love thee. He saith to him: Feed my lambs.
[16] He saith to him again: Simon, son of John, lovest thou me? He saith to him: Yea, Lord, thou knowest that I love thee. He saith to him: Feed my lambs.
[17] He said to him the third time: Simon, son of John, lovest thou me? Peter was grieved, because he had said to him the third time: Lovest thou me? And he said to him: Lord, thou knowest all things: thou knowest that I love thee. He said to him: Feed my sheep.
Why did Jesus call him "Simon" the very last time, recorded in Scripture, when He spoke directly to him?
Why did He ask him three times? It couldn't possible be because Jesus knew Simon would deny Hime three times, could it?
At this point in Scripture, Peter had already denied Jesus.
And so thrice, Jesus asks him so that he may be redeemed for each time he had made that denial.