Đại Ngu

Etymology
. The first element is typical in exalted names in the Chinese cultural sphere. The second element is rather obscure, with literal meanings ranging from "to anticipate", "to doubt", "to deceive", to the name of an ancient Chinese fiefdom ruled by. The character is occasionally used as an alternative for, which is the most popular interpretation, hence "Great Joy".

Proper noun

 * 1) the official name of Vietnam from 1400 to 1428 under the