Out of the two I think I prefer Elden with Ender, they both have a similar vibe. I’m familiar with Elden ring but it wouldnt be my first thought on hearing the name and tbh I live with a gamer and was not aware of any gaming connection to Ender, my strongest connections would be the book. If you were really concerned you could consider changing the spelling to Eldon to further separate it from the game.
I’d suggest….. (sorry for repeats and I’m sticking with the ‘e’ theme though I’m not sure if that’s what your going for)
Ellis
Edern (maybe too close to Ender since they use the same letters? Though I feel the sound is distinct enough)
Efron
Enslow
Enzo
Evren
Everson