Gamers are, for once, just real here. It doesn't have to do as much with games as medium at all. First, it is a dislike for overly unique names, no matter their origin. It is also a dislike for parents forcing their fandom onto their children in such a manner. If someone came here and wanted to give her child a very unique name inspired by some currently-but-perhaps-not-in-20-years popular TV series, movie, or book, the response would hardly be more sympathetic. Do you think Khaleesi, Obi Wan Kenobi, or Peeta, or some weird anime name, would fly better? Or Legolas or Arwen, names from a 60 year old hardly obscure work?
And, yes, we also do realize that games aren't held in the same regard as books, movies, or music, not yet anyways. We might wish that would be different, which would require both society to become more accepting
and games to mature, but we don't want to make our own kids the spearheads of this effort without their consent, and we don't want them to suffer from that.
Also, I've read plenty of comments on other sites linking to this thread from people claiming that they left the Escapist because of how mean-spirited and vicious the forums are, and I have little means of proving them wrong.
I was actually very surprised how much people cared about the future well-being of a child that they don't know at all, and the critical distance and they displayed towards their own fandom in doing so. Sure, it certainly helped that you could criticize someone in the process, but that doesn't invalidate that they cared.
Truly vicious comments like "you're horrible parents" or "you shouldn't have children" were actually very rare. But calling your decision a bad parenting decision is direct, yes, and not exactly minced, but hardly vicious, and most people didn't go nearly as far.
Someone people already voiced the sentiment that you just came here looking for validation for your decision. You know, I don't believe that's true, even though it very much appears this way now. But in your first statement you expressed some doubts about whether you're "totally off base" with this name. And all that people here did was telling you that, yes, you're right to have these doubts, your doubts are totally valid!
But when facing this criticism, you became very defensive about it, which is only understandable in the situation you're in, but still unfortunate. You seem to have explained it to yourself that you got negative reactions because people are just assholes, but not because they genuinely care and genuinely think it is a bad idea. Instead of embracing the criticism, and thinking about the arguments forwarded here, you became even more convinced of your decision, and brushed all the doubts you yourself had away.