You are funny. Of course there's name collisions. There's a 1000 people out there called Christian, just to name an example. Such collisions are prone to happen.
All of that wouldn't happen if you enhanced your name with for example an Ethereum address.
You can be AION 0xDECAF9CD2367cdbb726E904cD6397eDFcAe6068D (address just an example, please make your own Ethereum address, this one is taken, please don't send any ETH there, it's not my address)
Nobody could copy you, because you are the only one who's got the private key matching that address. If somebody wants proof, make them send you some ETH and you send the ETH back. Voila.
And the other guy should go and make his own Ethereum address. No more mixing up!
If you used that format, you'd also have a donation address right there in the name...
I would, however, try to win the mexican AION guy over - and for example make a collab track? AION vs AION