B?o ??i ('keeper of greatness'; 22 October 1913  30 July 1997); born Nguy?n Ph?c V?nh Th?y; was the 13th and last ruler of the Nguyen dynasty. From 1926 to 1945; he was king (or emperor) of Annam under French 'protection'.B?o ??i ('keeper of greatness'; 22 October 1913  30 July 1997); born Nguy?n Ph?c V?nh Th?y; was the 13th and last ruler of the Nguyen dynasty. From 1926 to 1945; he was king (or emperor) of Annam under French 'protection'. Empress Nam Ph??ng (14 December 1914  16 December 1963); born Marie-Th?r?se Nguy?n H?u Th? Lan; later Imperial Princess Nam Ph??ng; was the first and primary wife of B?o ??i; the last king of Annam and last emperor of Vietnam; from 1934 until her death. She also was the first and only empress consort (ho?ng h?u) of the Nguy?n Dynasty.