History is interesting and often offers more than fiction. Upon Rome's decline . . . really not a fall, but a slow erosion which experienced brief periods of resurgence, followed by even greater decline . . . several Germanic ttribes usurped their power. The Alamans, Visigoths, the Ostrogoths, Franks and a smattering of smaller tribes. In the northern part of the decayed Empire the Franks under Clovis shirked Roman Rule and declared themselves Kings. They were known for their unshorn hair and were therefore called the "Long Haired Kings."
The name is as good as anything in fiction!
This image is copyright the Bettman Historical Archive.