Schönemann, also spelled Schoenemann, is a German surname. "Schaneman", is the modern spelling.
See:
Dora Schönemann (born 1911), German swimmer Hinnerk Schönemann (born 1974), German actor Lili Schönemann (1758–1817), daughter of a banker from Frankfurt Peter Schönemann, German psychometrician and statistician Theodor Schönemann (1812–1868), German mathematician