Augustine of Hippo — as excerpted in the Catena Aurea on Matthew 1:1

“(cont. Faust. ii. 1.) Faustus affirms, that “the Gospel both begins, and begins to be so called, from the preaching of Christc, in which He no where affirms Himself to have been born of men. Nay, so far is this genealogy from being part of the Gospel, that the writer does not venture so to entitle it; beginning, ‘The book of the generation,’ not ‘The book of the Gospel.’ Mark again, who cared not to write of the generation, but only of the preaching of the Son of God, which is properly The Gospel, begins thus accordingly, The Gospel of Jesus Christ the Son of God. Thus then, all that we read in Matthew before the words, Jesus began to preach the Gospel of the kingdom, (Matt. 4:17.) is a part of the genealogy, not of the Gospel. I therefore betook myself to Mark and John, with whose prefaces I had good reason to be satisfied, as they introduce neither David, nor Mary, nor Joseph.” To which Augustine replies, What will he say then to the Apostle’s words, Remember the resurrection of Jesus Christ of the seed of David according to my Gospel. (2 Tim. 2:8.) But the Gospel of the Apostle Paul was likewise that of the other Apostles, and of all the faithful, as he says, Whether I, or they, thus have we preached the Gospel.”