What is "cerny"

Černý is a Czech language surname, which means " black". Like many other surnames, this originally made reference to a person's physical qualities, namely dark hair colour or perhaps darker complexion. Variants of the name include Cerny and feminine forms Černá in Czech, Čierna in Slovak, and Czarna in Polish.

Cognate surnames in other Slavic-speaking countries include Čierny in Slovak, Czarny in Polish, and Chyorny in Russian. There also exist Anglicised, Germanised or Polonised forms (Cherny, Tscherny, or Czerny, respectively). Related surnames include Černík, Chernenko, and Chernov.