I used to help run a brownie pack and all of the helpers were named after Disney characters. I was Nala. None of the parents realised it wasn't my real name and none batted an eyelid when I was introduced. This was 10 years ago when lion king was still quite recent. If you like it, use it!
I never even thought of the lion king until you mentioned it. Me and dp are at the TTC stage.--Been there 2+ years don't think it's ever going to happen--. And I know from experience you'll go through 100s of names. Well at least we are. We change our mind every week. or keep running and ahhring over our short list.