While I actually think the name Errol is kinda neat (and it has already a nice "tolkenian" quality to it), my Latin sense is tingling here, as I don't think there is a derivation from "erro, -onis" (vagabond, wanderer) to Errol. From a linguistic point of view, it doesn't really make sense.My real name is Errol, one of the rarer and least popular names around and I've had a very love/hate thing going on for years, with no one ever really having heard of it, spelling or pronouncing it wrong, having to repeat it all the time.
I researched it before, it comes from the latin word "erró" 'to wander'. Well, it also means "error" as in straying, wandering, mistaking etc, so it's even semi-insulting lol.
I did a bit of searching, and most sources say it's either a variant of "Earl" (warrior, nobleman: from proto-Germanic "erlaz"), or a Scottish surname derived from a place (Errol). A few say it's from Latin, but while I'm not an expert in etymology, it doesn't sound true.
Sorry to be pedantic, but if you want a tattoo with that, better to be safe than sorry.
