The Nguyễn lords, also known as the Nguyễn clan, were the rulers of southern Đại Việt during the Revival Lê dynasty and ancestors of Nguyễn dynasty's emperors. The territory they ruled was known contemporarily as Đàng Trong and by Europeans as Cochinchina, in opposition to the Trịnh lords ruling northern Đại Việt, known then as Đàng Ngoài. Both Nguyễn and Trịnh lords were de jure subordinates of the Lê dynasty.

The Revival Lê dynasty, also called the Later Lê Restoration in historiography, officially Great Việt, was a Vietnamese dynasty that existed between 1533 and 1789. The Primal Lê dynasty (1428–1527) and the Revival Lê dynasty (1533–1789) collectively formed the Later Lê dynasty.