Analysis of information sources in references of the Wikipedia article "Evanghelie" in Romanian language version.
The historical narratives, the Gospels and Acts, are anonymous, the attributions to Matthew, Mark, Luke, and John being first reported in the mid-second century by Irenaeus
Finally it is important to realize that none of the four gospels originally included an attribution to an author. All were anonymous, and it is only from the fragmentary and enigmatic and—according to Eusebius, from whom we derive the quotation—unreliable evidence of Papias in 120/130 CE that we can begin to piece together any external evidence about the names of their authors and their compilers. This evidence is so difficult to interpret that most modern scholars form their opinions from the content of the gospels themselves, and only then appeal selectively to the external evidence for confirmation of their findings.
When the Gospels of the New Testament are alluded to and quoted by authors of the early second century, they are never entitled, never named. Even Justin Martyr, writing around 150-160 CE, quotes verses from the Gospels, but does not indicate what the Gospels were named. For Justin, these books are simply known, collectively, as the "Memoirs of the Apostles." It was about a century after the Gospels had been originally put in circulation that they were definitively named Matthew, Mark, Luke, and John. This comes, for the first time, in the writings of the church father and heresiologist Irenaeus, around 180-85 CE.