from the GNU version of the Collaborative International Dictionary of English
- n. The off-spring of an octoroon and a white person.
from The Century Dictionary and Cyclopedia
- n. In the West Indies, the child of a white person by one who has one sixteenth part of negro blood.
Sorry, no etymologies found.
Quadroon, octoroon and, more rarely, quintroon ... and hexadecaroon. would come into play.
The percentage of black heritage had different legal significance in different states over time, so it sometimes mattered whether you were a mulatto, a quadroon, an octoroon, or even a quintroon.