Headinhands as promised I've returned with a more clear explanation.
Richard Buckram wrote a book called “Jesus and the eyewitnesses” and one of the things he looked at was, if they were fabricating it, how hard it would be to do and get right. One of the things he looked at was the names used in 1st century Palestine. They found the top 5 were Simon, Joseph, Lazarus, Judas, John. He then compared these (secular) findings to the Gospels and Acts, and found they were: Simon, Joseph, Lazarus, John and Judas.
Then he looked to see if they match in the biblical representation was accurate. He found, for example, 15.6% from secular records bore one of the most popular names – Joseph or Simon. In the bible 18.2% bore one of the most popular names – Joseph or Simon, which is amazingly similar.
41.5% of the population in secular records bore one of the nine most popular names and 40.3% of the biblical names bore one of the nine most popular names. Strikingly similar.
So in other words, the popularity matches what we would see in the popular culture. If you were going to invent characters of a story, first of all, would you even think of the significance of this? And secondly, how could you achieve any accuracy?
If you think of the most popular names of any male name of Britain, not newborns, but across the generations, what would you come up with? Alan? Steve? Joshua? Michael? Do you think you could get all 4? And do you reckon you could get them in the right order?
They are actually John (9%) David (9%) Michael (6%) and Paul (5%).
A church I know looked into their 1000 strong membership to compare this and found the most popular names were an exact match! They were found to be: John (11%) David (9%) Michael (7%) and Paul (4%).
So if you were going to write a real story about today, you would expect it to reflect these findings.And the bible does just that, which adds to its reliability and authenticity.