African-American heritage of presidents of the United States
Calvin Coolidge's mother Victoria Moor was claimed to be of a mixed-race family in Vermont. Vaughn noted that her surname was derived from "Moor", a European term for people of North Africa. He did not note that another meaning of her surname is the landscape feature of moor or bog. People's surnames were often based on such landscape features when surnames became generally adopted in 14th century England. Moor/Moore is a common name in England, Scotland, and Ireland.
Moors
In 711, troops mostly formed by Moors from northern Africa led the Umayyad conquest of Hispania. The Iberian peninsula then came to be known in Classical Arabic as al-Andalus, which at its peak included most of Septimania and modern-day Spain and Portugal.