Christianity brought with it a group of names including Peter, James, Andrew, Nathan, David, Philip, Moses, Abraham, Isaac, Jacob, and a bunch of others beside the name JOHN. Why did JOHN seem to take first place among the women and men naming their children. First, John was a follower (disciple) of Jesus. Writing about himself in his own book called John, he describes himself as "...one of His disciples, whom Jesus loved." [Book of John 13:22] John also records that Jesus himself gave him the responsibility to care for his mother at the time of his death. John writes:
"When Jesus therefore saw His mother, and the disciple whom He loved standing nearby, He said to His mother, 'Woman, behold, your son!' Then He said to the disciple, 'Behold, your mother!' And from that hour the disciple took her into his own household" [Book of John 19:26-27]
Taken from The Ryrie Study Bible: New American Standard, Translation, Moody Press, Chicago, 1976.
This lays the foundation for the use of the name JOHN among those mother's of the Christain faith. It was this disciple that was considered the "closest" to Jesus. Not only that, but he was given the responsibility to care for the mother of Jesus, Mary. John also is credited with writing five books of the New Testiment, thus making him one of the leading figures of the first generation of Christians. Thus, a Christian mother would want to name at least one male child JOHN. She would also want to name at least one daughter MARY. Now remember that the language these names would have been written in was LATIN. The Latin alphabet did not include the letter "J". It had the letters (sounds) "O", and "A", and "H". Therefore, the name JOHN would have been written in the Latin as "IOAN". This begins the groundwork for our surname JONES as early as 300 AD.