Eusebius and the authors of the Gospels
Does this quote (emphases added) from Eusebius indicate that the Gospels were not anonymous?
The third book of the Gospel, that according to Luke, the well-known physician Luke wrote IN HIS OWN NAME in order after the ascension of Christ, and when Paul had associated him with himself as one studious of right. Nor did he himself see the Lord in the flesh; and he, according as he was able to accomplish it, began his narrative with the nativity of John. The fourth Gospel is that of John, one of the disciples. When his fellow-disciples and bishops entreated him, he said, "Fast ye now with me for the space of three days, and let us recount to each other whatever may be revealed to each of us." On the same night it was revealed to Andrew, one of the apostles, that John should narrate all things IN HIS OWN NAME as they called them to mind.