WordNet (r) 3.0 (2006):

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