Charles I in WordNet English dictionary

1. king of the Franks and Holy Roman Emperor; conqueror of the Lombards and Saxons (742-814)
   Charlemagne  Carolus  Charles  Charles I  Charles the Great 
   
2. son of James I who was King of England and Scotland and Ireland; was deposed and executed by Oliver Cromwell (1600-1649)
   Charles  Charles I  Charles Stuart 
   
3. as Charles II he was Holy Roman Emperor and as Charles I he was king of France (823-877)
   Charles  Charles II  Charles I  Charles the Bald