The problem with Papias, and was one of the earliest of so called church fathers, is that even his earliest works are dated to 95 CE. He appears to be talking to third hand sources at the earliest:
"I shall not hesitate also to put into ordered form for you, along with the interpretations, everything I learned carefully in the past from the elders and noted down carefully, for the truth of which I vouch. For unlike most people I took no pleasure in those who told many different stories, but only in those who taught the truth. Nor did I take pleasure in those who reported their memory of someone else’s commandments, but only in those who reported their memory of the commandments given by the Lord to the faith and proceeding from the Truth itself. And if by chance anyone who had been in attendance on the elders arrived, I made enquiries about the words of the elders—what Andrew or Peter had said, or Philip or Thomas or James or John or Matthew or any other of the Lord’s disciples, and whatever Aristion and John the Elder, the Lord’s disciples, were saying. For I did not think that information from the books would profit me as much as information from a living and surviving voice."
Papias of Hierapolis - Wikipedia
And any of his references to the Gospels do not seem to be directly stating who wrote them.