The first name Mo is ♀ female and ♂ male.
Mo is a short form of several boy’s and girl’s names, e.g. Morris, Maureen or Monica.
The boy’s name Mo means “dark skinned” (from Morris) and the girl’s name Mo means “sea of bitterness”, “drop of the sea”, “star of the sea”, “rebelliousness”, “exalted one” and “wished for child” (from Maria) and “unique”, “hermit” and “advisor” (from Monica).