Who were these people? ?

clovis:

charlemagne:

otto i:

william the conqueror, duke of normandy:

Clovis: Clovis was the first king of the Franks to unite all of the Frankish tribes under one ruler, changing the form of leadership from a group of royal chieftains to rule by a single king and ensuring that the kingship was passed down to his heirs

Charlemagne: Charlemagne, also known as Charles the Great or Charles I, was King of the Franks. He united much of Europe during the early Middle Ages and laid the foundations for modern France, Germany, and the Low Countries.

Otto I: Otto I, traditionally known as Otto I the Great, was German king from 936 and emperor of the Holy Roman Empire from 962 until his death in 973. He was the oldest son of Henry I the Fowler and Matilda.

William the Conqueror, Duke of Normandy: Born circa 1028 in Falaise, Normandy, France, William the Conqueror was an illegitimate child of Robert I, duke of Normandy, who died in 1035 while returning from a pilgrimage to Jerusalem. At only 8 years of age, William became the new duke of Normandy.

The answer is an appellate court.