Players can change names to what ever they want - it take a few days before the change take effect.
Names can be changed it anything. So two or more players can have same name. Bug ??

I had for long time wondered how some players could get so many defensive wins.
I have attacked them many times so I know what Card they use. How they place them and what helper Card they normally get. My deck wins all the time so I didn’t feed them any wins.

So I made same deck and all got all the Cards to max level. Result: they still gor 10 times more defensive wins.

So I changed my name to test if the high number of wins related to there names.
In one case the number of defensive increased to 10 in 30 min from (normally I get around one per 30 min). Then the number of defensive wins went back to normal levels.

To me this indicate they feed their main account using alt. When I change my name they started to feed me with wins until he after 30 min discovered what was going on and stoped feeding me.