Its source is a Latin expression meaning "Woods."
This girl's name is used in French.
The name Sylvie ranked 3193rd in popularity for females of all ages in a sample of the 1990 US Census.
Rhea Silvia was an ancient nature goddess, mother to the twin founders of Rome, Romulus and Remus.
Shakespeare used the name Silvia for the love interest in his play Two Gentlemen of Verona, probably intending to give the impression of a typical Italian girl. However, almost everything the Bard touched turned to English, and it has been regarded as a solidly English name ever since.
While the Silvia spelling is certainly more ancient, Sylvia has been preferred for the last two centuries.