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.
Indian Moors
The Indian Moors was a collective of ethnic groups, identified by their Islamic faith and similar geographic origin. The Largest of those groups being Tamils from South India. Others included the Memons, originally from Sind (in modern Pakistan), who first arrived in 1870; in the 1980s they numbered only about 3,000. The Bohra and the Khoja came from Gujarat, India after 1880; in the 1980s they collectively numbered fewer than 2,000.