Lc 1:59-63
When they came on the eighth day to circumcise the child, they were going to call him Zechariah after his father, but his mother said in reply, "No. He will be called John." But they answered her, "There is no one among your relatives who has this name." So they made signs, asking his father what he wished him to be called. He asked for a tablet and wrote, "John is his name," and all were amazed.