There are, according to Forebears (not the best source out there!) Germans named
German - but I imagine a) most are immigrants b) it's less problematic than being named English in an anglophone country, as the
German word for
German isn't
German.
masculine list:
https://www.behindthename.com/pnl/191050/124079feminine list:
https://www.behindthename.com/pnl/191050/124080