John Chrysostom
Catena Aurea · Lukasevangelium 1
And it came to pass, that on the eighth day they came to circumcise the child; and they called him Zacharias, after the name of his father. And his mother answered and said, Not so; but he shall be called John. And they said unto her, There is none of thy kindred that is called by this name. And they made signs to his father, how he would have him called. And he asked for a writing table, and wrote, saying, His name is John. And they marvelled all. And his mouth was opened immediately, and his tongue loosed, and he spake, and praised God.
But the name John is also interpreted the grace of God. Because then by the favour of Divine grace, not by nature, Elisabeth conceived this son, they engraved the memory of the benefit on the name of the child.