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.
Mohe people
The Mohe, Malgal, or Mogher were a Tungusic people who lived primarily in modern Northeast Asia. The two most powerful Mohe groups were known as the Heishui Mohe, located along the Amur River, and the Sumo Mohe, named after the Songhua River. The Mohe constituted a major part of the population in the kingdom of Balhae, which lasted from the late 7th century to early 10th century. After the fall of Balhae, few historical traces of the Mohe can be found, though they are considered to be the primary ethnic group from whom the Jurchen people descended. The Heishui Mohe in particular are considered to be the direct ancestors of the Jurchens, from whom the 17th century Manchu people originated. The Mohe practiced a sedentary agrarian lifestyle and were predominantly farmers who grew soybean, wheat, millet, and rice, supplemented by pig raising and hunting for meat. The Mohe were also known to have worn pig and dog skin coats.