“several members of the English royalty, the most significant of whom was the great king Charlemagne”
Uh, Charlemagne was french, or more specifically, a king of the franks.
2.1 George Washington
2.1.1 From Charlemagne to William the Conqueror
2.1.2 From William the Conqueror to Henry II
2.1.3 From Henry II to George Washington