WordNet sense 1 (King of France from 1560 to 1574 whose reign was dominated by his mother Catherine de Medicis (1550-1574)):

Charles IX

WordNet sense 2 (King of France who began his reign with most of northern France under English control; after the intervention of Jeanne d'Arc the French were able to defeat the English and end the Hundred Years' War (1403-1461)):

Charles VII

WordNet sense 3 (as Charles II he was Holy Roman Emperor and as Charles I he was king of France (823-877)):

Charles the Bald, Charles I, Charles II

WordNet sense 4 (son of James I who was King of England and Scotland and Ireland; was deposed and executed by Oliver Cromwell (1600-1649)):

Charles Stuart

WordNet sense 5 (the eldest son of Elizabeth II and heir to the English throne (born in 1948)):

Prince Charles

WordNet sense 6 (French physicist and author of Charles's law which anticipated Gay-Lussac's law (1746-1823)):

Jacques Alexandre Cesar Charles, Jacques Charles

WordNet sense 7 (king of the Franks and Holy Roman Emperor; conqueror of the Lombards and Saxons (742-814)):

Charlemagne, Carolus, Charles the Great

WordNet sense 8 (a river in eastern Massachusetts that empties into Boston Harbor and that separates Cambridge from Boston):

Charles River