Devaki, in hindu mythology is a Hindu mother goddess mentioned in epic and Puranic literature.
Devaki’s brother, Kasma, believed the eight children would kill him, so he slaughtered the first six. In order to save the remaining two, Vishnu after impregnating Devaki with two hairs from his head had Balarama transferred to the womb of the goddess Rohini, and Krishna to Yasoda, the wife of a cowherd, Nanda. A.G.H.
Jordan, Michael, Encyclopedia of Gods, New York, Facts On File, Inc. 1993, p. 63