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|
| Cales (city state of Magna Graecia c.800-338 BCE) |
| Caletes (Celtic tribe of Belgica) |
| Cambodia | 1959-69 | 1970-75 | 1979-90 | 1994- |
| Cameroon | 1960- |
| Canada | 1858-1901 | 1902-10 | 1911-36 | 1937-53 | 1953-64 | 1965-78 |
| 1979-89 | 1990- |
| Cappadocia (ancient Hellenistic Kingdom in Asia Minor) |
| Cape Verde | 1994- |
| Carnute (Celtic tribe of Armorica) |
| Carnute (celtic tribe of Gaul) |
| Cassander 316-297 BCE (ancient Macedonian King) |
| Catuslugi (Celtic tribe of Belgica) |
| Cayman Islands | 1972-86 |
| Castulo (Celtiberian tribe) |
| Catuellauni / Catuvellauni (Celtic tribe of Britanica) |
| Celtic Kingdoms (350-52 BCE) |
| Cenomani (Celtic tribe of Armorica) |
| Central
African
Republic |
1972- |
| Chad | 1974- |
| Chandragupta Maurya c.340 - 297 BCE (ancient indian emperor) |
| Chandragupta I c. 320 - 335 CE (ancient indian emperor) |
| Chandragupta II Vikramaditya c. 380 - 414 CE (ancient indian emperor) |
| Chile | 1920-41 | 1942-53 | 1954-58 | 1960-70 | 1971-75 | 1975-80 |
| 1981-92 | 1992- |
| China (700 BCE - 500 CE) |
| China | 1936-49 | 1949-90 | 1991- |
| Chin (Qin) Empire 255 - 206 BCE (ancient chinese empire) |
| Colombia | 1952-66 | 1967-69 | 1969-88 | 1989- |
| Comoros | 1964-74 | 1975- |
| Congo | 1897-1908 | 1909-29 | 1940-49 | 1950-60 | 1961 | 1965 |
| 1967 | 1970-71 | 1972-79 | 1980-92 | 1993-99 | 2000 |
| 2001 | 2002 |
| Congo Republic | 1972- |
| Cook Islands | 1972-83 |
| Coponius 6-9 CE (roman procurator of judaea) |
| Coresus c.561-546 BCE (ancient lydian king) |
| Corieltaui / Coreiltavii (Celtic tribe of Britanica) |
| Corinth (city state of ancient greece) |
| Corisolites (Celtic tribe of Armorica) |
| Costa Rica | 1920-68 |
| Cote d'Ivoire | 1966 | 1961-present |
| Cotini (Celtic tribe of Pannonia) |
| Croatia | 1941-45 | 1993- |
| Cuba | 1915-50 | 1951-59 | 1959- |
| Cyprus | 1920-36 | 1938-49 | 1955-59 | 1960-82 |
| Cyrus II c. 590-.529 BCE (ancient persian emperor) |
| Czech Republic | 1993- |
| Czechslovakia | 1923-38 | 1960-90 |
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