In German, Schwarz means black, so it's not a nationality. Schwarz in reference to people refers to skin color, and there are black Germans, some immigrated, some are the result of mixed couples, even as far back as WWII.
german...it means black
Hannes Schwarz has written: 'Hannes Schwarz'
Hanns Schwarz's birth name is Schwarz, Ignatz.
Toby Schwarz's birth name is Tobias Schwarz.
l Reiner Schwarz has written: 'Reiner Schwarz'
Reiner Schwarz has written: 'Reiner Schwarz' -- subject(s): Catalogs
Viktoria Schwarz was born in 1985.
Brinsley Schwarz ended in 1975.
Brinsley Schwarz was created in 1969.
Jan Schwarz was born in 1958.
Ernst Schwarz died in 1962.
Ernst Schwarz was born in 1889.