No those people were "mustee", 1/16 Black (or less), i.e. one black great-grand parent, typically a Black slave grandmother (who had a daughter with a White man, the daughter being born a slave, then in turn having a daughter with another White man, etc.) . But that 1/16 meant they were effectively Black according to the "one drop" rule, and formally they were born to slaves and slaves themselves.There is a paradox in U.S. history: the U.S. does not mention the serfs who came from Europe with their landlords. In Europe, every landlord had a serf, but noble people came to the United States without peasants for some reason. The peasants came by themselves - completely free or as slaves sold by someone. This cannot be the case.
The New World slave societies paid extreme and obsessive heed to mixings between Whites, Blacks and others, creating an entire nomenclature to describe all manner of fractional mixings in the slave population. They would be lots of stuff in the end, but never just White. The progression was Mulatto, Quadroon, Octoroon, Mustee.
This is, or would have been had he lived in the New World at the time, a known Octoroon:
So is this: