Definition of "gemman"

But dar am a gemman yere, sah,--" "What!" came a surprised ejaculation that caused the negro to jump, and I heard a chair overturned within.

1904, Randall Parrish, When Wilderness Was King‎

But a negro servant who had been stationed as warden at the door refused to allow the messenger to pass in, saying, 'The gemman can't be disturbed.'

1891, Martha Finley, Elsie's Vacation and After Events‎

A gem-man who often comes down with me says his father was a slopseller in Ratcliffe Highway, and afterwards marrying the widow of Admiral Hughes, a rich old West India nabob, he left this young gemman the bulk of his property, and a very worthy fellow he is: but we've another rich fellow that's rather notorious at Brighton, which we distinguish by the name of the silver Ball, only he's a bit of a screw, and has lately ~285~~got himself into a scrape about a pretty actress, from which circumstance they have changed his name to the Foote Ball.

1825, Bernard Blackmantle, The English Spy‎