The meaning of what a right-hand man has changed in the last few decades to mean little more than a yes man or PA, but I'm trying to research what right-hand men use to be - a bodyguard who walked at a gentleman's right hand (the gentleman's lady on his left) so he could draw his sword and defend them against ruffians. I can't find anything about them on any of my usual sources, or even on Wiki. I think the time period they were in fashion was in the 1800, though I could be wrong.
Has anyone else even heard of this sort of thing, because the lack of anything on the internet makes me worry that I could have dreamt it up. o.O