I plugged our phone into our mac to charge it and it changed the name of the phone to my wife's phone. Attempt to backup from I cloud only gives backups since the name change. How do I reclaim my phone's name?

I plugged my i phone into our mac just to recharge it and somehow it recognized it as my wife's phone and changed the name of the phone to hers. I lost the carrier I was using, though it still can connect to internet. I tried to erase all settings and content, and then back up from I cloud, but it only offered backups since the name was changed. I can't make any calls at this point.