John 1:6

There came a man who was sent from God. His name was John.

This was John the big dipper. He was baptizing in the Jordan where there was much water.

King James, when he commissioned the 1611 translation insisted that the Greek should just be transliterated rather than translated as the Puritans wanted. They would have preferred dipped or immersed, but the Puritans had the last laugh as many of them were called Baptists thereafter.

Notice that it wasn't John's idea. He was sent by God. 'John' means 'Jehovah has been gracious' and so he had.