Cynthia \cy(n)-thia\ as a girl's name is pronounced SIN-thee-ah. It is of Greek origin, and the meaning of Cynthia is "from Mount Kynthos". Mythology: Kynthia was one of the names of Artemis, the goddess of the moon, referring to her birthplace on Mount Kynthos. Cynthia was later used by the Roman poet Propertius in his love poetry. The English given name was not used in the Middle Ages, but was revived in the 17th and 18th centuries. Cyntia is a Spanish form. Cindy is its nickname. Many of the diminutives are also variants of Lucinda. Ballerina Cynthia Gregory; actress Cynthia Nixon.
Cynthia has 42 variant forms: Cinda, Cindee, Cindi, Cindie, Cindy, Cinnie, Cinny, Cinthia, Cintia, Cinzia, Cyn, Cynda, Cyndee, Cyndia, Cyndie, Cyndra, Cyndy, Cynnie, Cynthea, Cynthie, Cynthya, Cyntia, Cytia, Kynthia, Kynthija, Sindee, Sindi, Sindy, Sindya, Sinnie, Sinnie, Sinny, Synda, Syndee, Syndi, Syndy, Syntha, Synthee, Syntheea, Synthia, Synthie and Synthya.