Jay \jay\ as a girl's name (also used as boy's name Jay), is of Latin origin, and the meaning of Jay is "blue crested bird". Also a medieval name possibly from Gaius (Latin) "happy"; also pet form of names beginning with J- (see also Dee and Kay). In Hindi, it is derived from Sanskrit, meaning "victory". The name has been inspired by John Jay, a great American jurist. The name is also used in combination with other names. Gymnast Jaycie Phelps.
Jay has 13 variant forms: Jae, Jalin, Jaline, Jaya, Jaycie, Jaye, Jayla, Jaylah, Jaylan, Jaylene, Jeh, Jey and Jeyla.