[2] The word Đàng Trong first appeared in the Dictionarium Annamiticum Lusitanum et Latinum by Alexandre de Rhodes.
During the 17th century and almost all the 18th century, Đàng Trong was a de facto independent kingdom ruled by the Nguyễn lords while they claimed to be loyal subjects of the Lê emperors in Thăng Long (Hanoi).
Nguyễn rulers titled themselves as Chúa (chữ Nôm: 主,lit.
"King") until Lord Nguyễn Phúc Khoát officially claimed the title Vũ Vương (chữ Nôm: 武王,lit.
[a] The country did not have an official name (quốc hiệu), foreigners often called it the kingdom of Quảng Nam (Chinese: 廣南國; pinyin: guǎng nán guó; Chữ Quốc ngữ: Quảng Nam Quốc), after the Quảng Nam Governorate where the important harbor Hội An (Faifo) located.