Cochinchina or Cochin-China is a historical exonym for part of Vietnam, depending on the contexts, usually for Southern Vietnam. Sometimes it referred to the whole of Vietnam, but it was commonly used
Cochinchina in 1829 under Nguyễn Dynasty
The six provinces of Lower Cochinchina in 1863
Throughout its history, Vietnam has been referred to by many names, either for the whole country or parts of it.
Plaque of the Embassy of the Socialist Republic of Viet Nam in Beijing, being inscribed in standard Vietnamese and Chinese.
The endonym Vietnam was supposedly coined by 16th century poet Nguyễn Bỉnh Khiêm.
10th century brick with Chữ Hán inscription: 大越國軍城塼 "Brick [to build] the Đại Việt State's military forts"
Scholar consensus believes that the exonym of Yue, Yueh, and Viet peoples are related to their notorious axes. A bronze ax from Dong Son burial site, Thanh Hoa, North-central Vietnam, dated 500 BC.