The Gospels were written by Matthew, Mark, Luke, and John, as shown by early testimony, internal evidence, manuscript titles, and apostolic origin.
What Is the Synoptic Problem of Matthew, Mark, and Luke and What is the Hypothetical So-Called Q Document?
The Synoptic Problem asks how Matthew, Mark, and Luke relate; Q remains a hypothetical source without manuscript or early Christian evidence.
The Synoptic Gospels In Early Christianity: Why Is the Preferred Choice the Testimony to the Priority of the Gospel of Matthew?
Early testimony favors Matthew’s priority, Mark’s Petrine accuracy, and Luke’s orderly investigation without requiring Q or Markan priority.

