Or Christians, like Romans in Constantinople or Anglo-Saxons before Norman invasion. But to be fair, people didn’t really start to distinguish each other by ethnicity until much later, as religion was a much more important factor. A black person, like an Ethiopian would be deemed a curiosity in medieval Europe, but would not be treated downright hostile, due to their Christian faith.
A prime example would be when Kublai Khan sent Chinese Christians as a diplomatic mission to European courts and those Christians wrote of how great they were treated, once their religion was discovered.