Korea
North and South Korea have different names for their own country, and each other. Romanization of Korean has also produced many name variations which are common in English, but simply variations in romanization systems. For example Cheju Island is an older romanization of Jeju Province. In some cases the older romanizations have been retained in English sources. Some even older names, not now retained in English, are the result of Japanese pronunciation of Korean names duing the colonial period.
Read more about this topic: English Exonyms