The author identifies himself as John, historically considered to be the [[Apostle John]] who also wrote the [[Gospel of John]] along with [[I John]], [[II John]], and the [[Book of Revelation]]. Some theologians disagree, contending that only all three Epistles shared authorship by the same individual, or that only 2 John and 3 John had a common author. | The author identifies himself as John, historically considered to be the [[Apostle John]] who also wrote the [[Gospel of John]] along with [[I John]], [[II John]], and the [[Book of Revelation]]. Some theologians disagree, contending that only all three Epistles shared authorship by the same individual, or that only 2 John and 3 John had a common author. |