4 Johns but 1 Mark

In “Another Man with Two Names” we talked about a guy known as John Mark. Although no one knows why he’s called John Mark, it does distinguish him from other men in the Bible named John.

In addition to John Mark, I count four guys in the Bible with the name of John:

It seems there is only one guy called Mark. Mark is mentioned eight times in the New Testament (three times as John Mark, twice as Mark, but referring to John Mark, and three times as Mark, likely referencing John Mark.)

Lastly, John Mark (sometimes called Mark) may have been the author of the book of Mark. Wouldn’t it be confusing if we called his book John-Mark, instead?