Nan Ch'ien
The name given to the Feng Huo Ch'ien issued by the Chinese Emperor Wu Ti (A.D. 502-548) of the Liang dynasty and to the Pu Ch'uan of Wang Mang, because if worn by a woman she would give birth to a son.
Source: Frey's Dictionary (American Journal of Numismatics, Vol. 50, 1916)