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.
GNU Webster's 1913
- n. (Ethnol.) The off-spring of an octoroon and a white person.
“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.”
These user-created lists contain the word ‘quintroon’.
Originally this list was to contain multisyllabic words that end in "oon," but as you can see from the comments, all hell broke loose.
Looking for tweets for quintroon.