Cook Islands
noun: Cook Islander(s)
adjective: Cook Islander
Costa Rica
noun: Costa Rican(s)
adjective: Costa Rican
Cote d'Ivoire
noun: Ivorian(s)
adjective: Ivorian
Croatia
noun: Croat(s), Croatian(s)
adjective: Croatian
Cuba
noun: Cuban(s)
adjective: Cuban
Cyprus
noun: Cypriot(s)
adjective: Cypriot
Czech Republic
noun: Czech(s)
adjective: Czech
Denmark
noun: Dane(s)
adjective: Danish
Djibouti
noun: Djiboutian(s)
adjective: Djiboutian
Dominica
noun: Dominican(s)
adjective: Dominican