The name "Cynthia" is of Greek origin and means "of Cynthus." It refers to Mount Cynthus on the island of Delos in Greece. It is a girl's name.
Mythologically speaking, one of the names for the Greek goddess Artemis was Kynthia. Artemis was the goddess of the moon, and Kynthia referred to her birthplace on Mount Kynthos. The first-century Roman poet Propertius used the name Cynthia in his love poetry. It did not come into use in the English-speaking world until the 16th century when poets used it as a title for Queen Elizabeth I, referring to Artemis' reputation as a virgin goddess and Queen Elizabeth's as the virgin queen. The name is in common use in modern times.