Green’s Dictionary of Slang

(US black) a black person.

c.1953		Babs Gonzales ‘Manhattan Fable’ 🎵 He told Eddie that he was a real lame Jones. But he wouldn’t take him to the slams, as long as his greens was long enough.
a.1979		E. Blake in Rose Eubie Blake 130: I don’t think that ever happens to the Joneses. White people got so much to lose...they can get scared, but a Jones ain’t got nothin’ to lose. Nothin’ can scare him [HDAS].