Pity the poor picture editor. This weekend in the Sunday Times there was a short "Olympic trivia feature" -- including reference to the famous ancient athlete, Leonidas of Rhodes, who won three running titles at four successive Olympic Games in the second century BC. Nice to give him his due, but the only trouble was that the piece was illustrated by a picture of his namesake Leonidas King of Sparta, who had lived 300 years earlier and died "heroically" (and pointlessly) at the Battle of Thermopylae.
It is true that I had a pedant moment, and a sense of annoyance that somehow getting such things right doesn't seem to matter very much, when you are talking 2000 years ago. I mean they are all Greek, aren't they? Who cares which Leonidas, or even that there were more than one.
But the truth is that all kinds of people have trouble with Greek and Roman names.