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
Although a Christian and pagan Berber rebellion pushed out the Arabs temporarily, the Romanized urban population preferred the Arabs to the Berbers and welcomed a renewed and final conquest that left northern Africa in Muslim hands by 698. Over the next decades, the Berber and urban populations of northern Africa gradually converted to Islam, although for separate reasons. The Arabic language was also adopted. Initially, the Arabs required only vassalage from the local inhabitants rather than assimilation, a process which took a considerable time. The groups that inhabited the Maghreb following this process became known collectively as Moors. Although the Berbers would later expel the Arabs from the Maghreb and form temporarily independent states, that effort failed to dislodge the usage of the collective term.