Mustee

a mulatto is the offspring of a white man by a negress; a quadroon is the offspring of a white man and a mulatto mother; the child of a quadroon by a white man is a mustee; the child of a white man by a mustee woman is a mustiphini;

Source: wiktionary

Near the commencement of the weeding season of 1835, I was ordered to whip a young woman, a light mustee, for not performing her task.

Source: wiktionary