The historical archaeological and literary evidence also demonstrates that in the first century A.D. books were written and published with the title and name of the author placed at the end of the papyrus roll (also sometimes in the front) on which they were written or copied and on a tag attached to the outside of the papyrus roll called in Greek, a sillybos and in Latin a titulus. They were not usually placed in the text itself.
This was the normal custom of identifying the author of a book in the Roman world in the first century. The author did not normally identify himself in the text itself, but like today’s title page, his name was placed along with a title in a location on the document but outside the text. Several rolled up papyrus rolls would be stored in a round canister called a capsa with their tags placed at their tops so each roll could be easily identified.
There is no historical archaeological or literary evidence that the four NT gospels did not follow this normal custom of having the names of the authors of the gospels identified in this way when they first published and distributed their original gospels and their copies. All subsequent copies of papyrus rolls would also follow this practice.
In fact, as we have demonstrated in our article entitled “Authorship of the NT Gospels” the authors of the four NT gospels, Matthew, Mark, Luke, and John were well-known as the authors and their authorship was never disputed by the early church.
The early church fathers wrote about the circumstances surrounding the publishing of the four NT gospels. They never indicate that there was any anonymity or mystery surrounding the publishing of the gospels. They indicate their confident knowledge about who wrote the gospels, why they were written, and the general time period they were written.
The historical literary evidence from the early church fathers concerning each of the gospels and their publishing is summarized here by looking at the testimony of Irenaeus:
“MATTHEW ALSO ISSUED A WRITTEN GOSPEL AMONG THE HEBREWS IN THEIR OWN DIALECT, WHILE PETER AND PAUL WERE PREACHING AT ROME, AND LAYING THE FOUNDATIONS OF THE CHURCH. AFTER THEIR DEPARTURE, MARK, THE DISCIPLE AND INTERPRETER OF PETER, DID ALSO HAND DOWN TO US IN WRITING WHAT HAD BEEN PREACHED BY PETER. LUKE ALSO, THE COMPANION OF PAUL, RECORDED IN A BOOK THE GOSPEL PREACHED BY HIM. AFTERWARDS, JOHN, THE DISCIPLE OF THE LORD, WHO ALSO HAD LEANED UPON HIS BREAST, DID HIMSELF PUBLISH A GOSPEL DURING HIS RESIDENCE AT EPHESUS IN ASIA” (AGAINST HERESIES 3.1.1).
Are the Gospels Anonymous? - Christian Worldview Press
Are the Four Gospels Anonymous? - A Clear Lens
The Gospels Aren’t Anonymous » Undivided Looking