I'm kind of with Storm here. I think some of these things might become more apparent in the story. Who the kid is, and what they want. After all, maybe the gender is just in the background, and it doesn't really matter for the kid. Maybe they are one thing, but they are gender non-conforming all the same. There are so many options with gender to think about.

A name you could use for your kid which would be neutral would be Kai. It could go any way possible. Also? If you are really struggling for names, Behindthename.com is really good.

Good luck,
Anders