Bede the Venerable

(ubi sup.) And the reason that the Lord willed that he should at first be called otherwise, was that from the change itself of the name, a mystery might be conveyed to us. Peter then in Latin or in Greek means the same thing as Cephas in Hebrew, and in each language the name is drawn from a stone. Nor can it be doubted that is the rock of which Paul spoke, And this rock was Christ. (1 Cor. 10:4) For as Christ was the true light, and allowed also that the Apostles should be called the light of the world, (Matt. 5:14.) so also to Simon, who believed on the rock Christ, He gave the name of Rock.