Yknow, I've been playing HP:Magic Awakend recently, and I've always noticed the "Luna Lovegood married the grandson of Newt Scamander, not Neville" message on the loading screen.
So, we barely know anything about this guy, except that he is married to luna and he is the grandson of Newt Scamander. I have not seen a self insert of this guy just yet. He seems like a great character honestly. (If written properly)
Also a wiki of him exists, so go read that.