?

Rheinhardt ?

gehe rein => go in.
der Rhein => River in German
or short form of Rheinhardt

Reign?

rein (German) = pure (English)

Can someone tell me what this question is about? There’s absolutely no context.

I cant do this joke, no no no i cant, i cant withstand, so i dont know who rein is, but i belive he has a son. but im not sure.