Decisions, Decisions

I have reluctantly taken a break from writing this week because I needed to finish up edits on The Second Seal. I've got a couple more things to fix and it will be finished. Finally.



There is one thing about it that I'm not sure how I want to fix it. That's where you, my audience of experts, come in. I want your opinion on it.



Here's the situation: I have a character that uses two names. One is his real name and the other is an alias. The protagonist learns his real name, but not his alias. On the first edit, I thought it might be a little confusing to keep referring to the one character by two different names, so after revealing his real name, I referred to him only by his alias. I did this even when writing from the protagonist's POV (though he never refers to him by name in dialogue).



On this edit, however, a trusted friend suggested that I change it back.



Which way should I go on this?



I can provide examples if asked.