Apologetics - Gospel Authorship

Despite the textual critics, there's plenty of well-known evidence for the authorship of the gospels. Here is some lesser-known evidence for the authorship of the gospels I found on Triablogue offered by Jason Engwer:

Some Lesser Known Evidence Relevant To Gospel Authorship (Part 1)
Some Lesser Known Evidence Relevant To Gospel Authorship (Part 2)
Some Lesser Known Evidence Relevant To Gospel Authorship (Part 3)
Some Lesser Known Evidence Relevant To Gospel Authorship (Part 4)