Adam Clarke on Acts 15:14

Simeon hath declared - It is remarkable that James does not give him even the title which he received from our Lord at the time in which he is supposed to have been made head of the Church, and vicar of Christ upon earth; so that, it is evident, James did not understand our Lord as giving Peter any such pre-eminence; and, therefore, he does not even call him Peter, but simply Simeon. It is truly surprising that such a vast number of important pretensions should rest on such slight foundations! If tradition, no matter how interrupted or precarious, did not lend its support, feeble as that necessarily must be, the cause tried by plain Scripture would fall to the ground.

To take out of them a people for his name - To form among the Gentiles, as he had among the Jews, a people called by his name and devoted to his honor.